[Kernel-packages] [Bug 1309462] Re: Intel Ivybridge Mobile graphics backlight not adjustable
RavanH, as per http://us.acer.com/ac/en/US/content/drivers an update to your BIOS is available (2.18). If you update to this following https://help.ubuntu.com/community/BiosUpdate does it change anything? If it doesn't, could you please both specify what happened, and provide the output of the following terminal command: sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date Please note your current BIOS is already in the Bug Description, so posting this on the old BIOS would not be helpful. For more on BIOS updates and linux, please see https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette . Thank you for your understanding. ** Tags added: bios-outdated-2.18 ** Summary changed: - Intel Ivybridge Mobile graphics backlight not adjustable + 8086:0166 [Aspire V5-571P] Backlight not adjustable ** Changed in: linux (Ubuntu) Importance: Undecided => Low ** Changed in: linux (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1309462 Title: 8086:0166 [Aspire V5-571P] Backlight not adjustable Status in “linux” package in Ubuntu: Incomplete Bug description: On an Acer Aspire V5 with Intel Graphics, backlight control is not working. Both on Ubuntu GNOME 13.10 and 14.04 neither hotkeys or adjusting the applet slider has any effect. Note that the hotkeys Fn+Left and Fn+Right DO result in a moving slider indicator but no actual backlight change. Following https://wiki.ubuntu.com/Kernel/Debugging/Backlight "Testing for a workaround" here are my findings. More debugging info will be attached later. TESTING FOR A WORK AROUND > Reboot with only the kernel parameter acpi_backlight=vendor : > Make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > sudo su > echo 8 > /sys/class/backlight/intel_backlight/brightness > Please comment on if the brightness changes. Yes > Reboot with just kernel parameter video.use_bios_initial_backlight=0 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / No > If using a v3.13.x+ series kernel, reboot with just kernel parameter video.use_native_backlight=1 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. Yes / Yes * * please note that there is no brightness applet in Ubuntu GNOME 14.04 but going to the Settings > Screen Brightness & Lock the brightness can now be controlled BASIC DEBUGGING INFORMATION (all files will be attached later) $ ls /sys/class/backlight acpi_video0 intel_backlight $ dmesg | grep 'ACPI: Video' [2.969975] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) $ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) $ cat /proc/version Linux version 3.13.0-24-generic (buildd@panlong) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-24-generic 3.13.0-24.46 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: ravanhagen 1918 F pulseaudio CurrentDesktop: GNOME Date: Fri Apr 18 12:03:12 2014 EcryptfsInUse: Yes InstallationDate: Installed on 2014-04-14 (3 days ago) InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Daily amd64 (20140406) MachineType: Acer Aspire V5-571P ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=631fc653-5697-44cb-b877-f6cae0fda9cf ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/16/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: V2.13 dmi.board.asset.tag: No Asset Tag dmi.board.name: Aspire V5-571P dmi.board.vendor: Acer dmi.board.version: V2.13 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Acer dmi.chassis.version: V2.13 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrV2.13:bd11/16/2012:svnAcer:pnAspireV5-571P:pvrV2.13:rvnAcer:rnAspireV5-571P:rvrV2.13:cvnAcer:ct9:cvrV2.13: dmi.product.name: Aspire V5-571P dmi.product.version: V2.13 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packag
[Kernel-packages] [Bug 1309462] Re: Intel Ivybridge Mobile graphics backlight not adjustable
** Description changed: On an Acer Aspire V5 with Intel Graphics, backlight control is not working. Both on Ubuntu GNOME 13.10 and 14.04 neither hotkeys or adjusting the applet slider has any effect. Note that the hotkeys Fn+Left and Fn+Right DO result in a moving slider indicator but no actual backlight change. Following https://wiki.ubuntu.com/Kernel/Debugging/Backlight "Testing for a workaround" here are my findings. More debugging info will be attached later. TESTING FOR A WORK AROUND > Reboot with only the kernel parameter acpi_backlight=vendor : > Make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > sudo su > echo 8 > /sys/class/backlight/intel_backlight/brightness > Please comment on if the brightness changes. Yes > Reboot with just kernel parameter video.use_bios_initial_backlight=0 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / No > If using a v3.13.x+ series kernel, reboot with just kernel parameter video.use_native_backlight=1 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. - No / Yes * - - > If your backlight hotkeys are Fn+Left and Fn+Right, add kernel - parameter atkbd.softraw=0 to /boot/grub/menu.lst - - They are so I did (not /boot/grub/menu.lst but /etc/default/grub - though...) and I rebooted even though it is not written I should... - - > Then, switch to any console, e.g. Ctrl+Alt+F1, login by root account - and execute: showkey -s + Yes / Yes * * please note that there is no brightness applet in Ubuntu GNOME 14.04 but going to the Settings > Screen Brightness & Lock the brightness can now be controlled BASIC DEBUGGING INFORMATION (all files will be attached later) $ ls /sys/class/backlight acpi_video0 intel_backlight $ dmesg | grep 'ACPI: Video' [2.969975] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) $ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) $ cat /proc/version Linux version 3.13.0-24-generic (buildd@panlong) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-24-generic 3.13.0-24.46 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: ravanhagen 1918 F pulseaudio CurrentDesktop: GNOME Date: Fri Apr 18 12:03:12 2014 EcryptfsInUse: Yes InstallationDate: Installed on 2014-04-14 (3 days ago) InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Daily amd64 (20140406) MachineType: Acer Aspire V5-571P ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=631fc653-5697-44cb-b877-f6cae0fda9cf ro acpi_backlight=vendor quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/16/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: V2.13 dmi.board.asset.tag: No Asset Tag dmi.board.name: Aspire V5-571P dmi.board.vendor: Acer dmi.board.version: V2.13 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Acer dmi.chassis.version: V2.13 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrV2.13:bd11/16/2012:svnAcer:pnAspireV5-571P:pvrV2.13:rvnAcer:rnAspireV5-571P:rvrV2.13:cvnAcer:ct9:cvrV2.13: dmi.product.name: Aspire V5-571P dmi.product.version: V2.13 dmi.sys.vendor: Acer ** Description changed: On an Acer Aspire V5 with Intel Graphics, backlight control is not working. Both on Ubuntu GNOME 13.10 and 14.04 neither hotkeys or adjusting the applet slider has any effect. Note that the hotkeys Fn+Left and Fn+Right DO result in a moving slider indicator but no actual backlight change. Following https://wiki.ubuntu.com/Kernel/Debugging/Backlight "Testing for a workaround" here are my findings. More debugging info will be attached later. TESTING FOR A WORK AROUND > Reboot with only the kernel parameter acpi_backlight=vendor : > Make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > sudo su > echo 8 > /sys/class/backlight/intel_backlight/brightness > Please comment on if the brightness changes. Yes > Reboot with just kernel parameter video.use_bios_initial_backlight=0 > and make a comment on if you can now alter the backlight with hotkeys or a bri
[Kernel-packages] [Bug 1309462] Re: Intel Ivybridge Mobile graphics backlight not adjustable
** Description changed: On an Acer Aspire V5 with Intel Graphics, backlight control is not working. Both on Ubuntu GNOME 13.10 and 14.04 neither hotkeys or adjusting the applet slider has any effect. Note that the hotkeys Fn+Left and Fn+Right DO result in a moving slider indicator (this will change after testing with kernel parameters!) but no actual backlight change. Following https://wiki.ubuntu.com/Kernel/Debugging/Backlight "Testing for a workaround" here are my findings. More debugging info will be attached later. TESTING FOR A WORK AROUND > Reboot with only the kernel parameter acpi_backlight=vendor : > Make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > sudo su > echo 8 > /sys/class/backlight/intel_backlight/brightness > Please comment on if the brightness changes. Yes - > Reboot with just kernel parameter video.use_bios_initial_backlight=0 + > Reboot with just kernel parameter video.use_bios_initial_backlight=0 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. - No / Yes * + No / No > If using a v3.13.x+ series kernel, reboot with just kernel parameter video.use_native_backlight=1 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If your backlight hotkeys are Fn+Left and Fn+Right, add kernel parameter atkbd.softraw=0 to /boot/grub/menu.lst They are so I did (not /boot/grub/menu.lst but /etc/default/grub though...) and I rebooted even though it is not written I should... > Then, switch to any console, e.g. Ctrl+Alt+F1, login by root account and execute: showkey -s I did (after reboot mentioned above) and found that the hotkeys do not give any output at all anymore... Strange. So I reverted all changed above and rebooted with only "quiet splash" boot parameters but still the hotkeys remain dead. Not even the faux brightness slider change anymore. Very strange! * please note that there is no brightness applet in Ubuntu GNOME 14.04 but going to the Settings > Screen Brightness & Lock the brightness can now be controlled - BASIC DEBUGGING INFORMATION (all files will be attached later) $ ls /sys/class/backlight intel_backlight Note that this used to list video0_backlight (as I remember it) too but after testing and reverting (!) that entry remains gone. Strange. $ dmesg | grep 'ACPI: Video' [2.969975] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) $ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) $ cat /proc/version Linux version 3.13.0-24-generic (buildd@panlong) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-24-generic 3.13.0-24.46 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: - USERPID ACCESS COMMAND - /dev/snd/controlC0: ravanhagen 1918 F pulseaudio + USERPID ACCESS COMMAND + /dev/snd/controlC0: ravanhagen 1918 F pulseaudio CurrentDesktop: GNOME Date: Fri Apr 18 12:03:12 2014 EcryptfsInUse: Yes InstallationDate: Installed on 2014-04-14 (3 days ago) InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Daily amd64 (20140406) MachineType: Acer Aspire V5-571P ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=631fc653-5697-44cb-b877-f6cae0fda9cf ro acpi_backlight=vendor quiet splash vt.handoff=7 RelatedPackageVersions: - linux-restricted-modules-3.13.0-24-generic N/A - linux-backports-modules-3.13.0-24-generic N/A - linux-firmware 1.127 + linux-restricted-modules-3.13.0-24-generic N/A + linux-backports-modules-3.13.0-24-generic N/A + linux-firmware 1.127 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/16/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: V2.13 dmi.board.asset.tag: No Asset Tag dmi.board.name: Aspire V5-571P dmi.board.vendor: Acer dmi.board.version: V2.13 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Acer dmi.chassis.version: V2.13 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrV2.13:bd11/16/2012:svnAcer:pnAspireV5-571P:pvrV2.13:rvnAcer:rnAspireV5-571P:rvrV2.13:cvnAcer:ct9:cvrV2.13: dmi.product.name: Aspire V5-571P dmi.product.version: V2.13 dmi.sys.vendor: Acer ** Description changed: On an Acer Aspire V5 with Intel Graphics, backlight control is not working. Both on Ubuntu GNOME 13.10 and 14.04 neither hotkeys or adj
[Kernel-packages] [Bug 1309462] Re: Intel Ivybridge Mobile graphics backlight not adjustable
My appoligies: It turns out I forgot an update-grub after reverting the kernel parameters. Can/should the attached debug files be removed or replaced? Please let me know :) And please ignore all remarks about the default interface remaining gone. It's back and called acpi_video0 ... Also the hotkeys are working again and the showkey output is: Fn+Left: 0xe0 0x4c 0xe0 0xcc Fn+Right: 0xe0 0x54 0xe0 0xd4 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1309462 Title: Intel Ivybridge Mobile graphics backlight not adjustable Status in “linux” package in Ubuntu: Confirmed Bug description: On an Acer Aspire V5 with Intel Graphics, backlight control is not working. Both on Ubuntu GNOME 13.10 and 14.04 neither hotkeys or adjusting the applet slider has any effect. Note that the hotkeys Fn+Left and Fn+Right DO result in a moving slider indicator (this will change after testing with kernel parameters!) but no actual backlight change. Following https://wiki.ubuntu.com/Kernel/Debugging/Backlight "Testing for a workaround" here are my findings. More debugging info will be attached later. TESTING FOR A WORK AROUND > Reboot with only the kernel parameter acpi_backlight=vendor : > Make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > sudo su > echo 8 > /sys/class/backlight/intel_backlight/brightness > Please comment on if the brightness changes. Yes > Reboot with just kernel parameter video.use_bios_initial_backlight=0 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / No > If using a v3.13.x+ series kernel, reboot with just kernel parameter video.use_native_backlight=1 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If your backlight hotkeys are Fn+Left and Fn+Right, add kernel parameter atkbd.softraw=0 to /boot/grub/menu.lst They are so I did (not /boot/grub/menu.lst but /etc/default/grub though...) and I rebooted even though it is not written I should... > Then, switch to any console, e.g. Ctrl+Alt+F1, login by root account and execute: showkey -s I did (after reboot mentioned above) and found that the hotkeys do not give any output at all anymore... Strange. So I reverted all changed above and rebooted with only "quiet splash" boot parameters but still the hotkeys remain dead. Not even the faux brightness slider change anymore. Very strange! * please note that there is no brightness applet in Ubuntu GNOME 14.04 but going to the Settings > Screen Brightness & Lock the brightness can now be controlled BASIC DEBUGGING INFORMATION (all files will be attached later) $ ls /sys/class/backlight intel_backlight Note that this used to list video0_backlight (as I remember it) too but after testing and reverting (!) that entry remains gone. Strange. $ dmesg | grep 'ACPI: Video' [2.969975] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) $ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) $ cat /proc/version Linux version 3.13.0-24-generic (buildd@panlong) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-24-generic 3.13.0-24.46 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: ravanhagen 1918 F pulseaudio CurrentDesktop: GNOME Date: Fri Apr 18 12:03:12 2014 EcryptfsInUse: Yes InstallationDate: Installed on 2014-04-14 (3 days ago) InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Daily amd64 (20140406) MachineType: Acer Aspire V5-571P ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=631fc653-5697-44cb-b877-f6cae0fda9cf ro acpi_backlight=vendor quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/16/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: V2.13 dmi.board.asset.tag: No Asset Tag dmi.board.name: Aspire V5-571P dmi.board.vendor: Acer dmi.board.version: V2.13 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Acer dmi.chassis.version: V2.13 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrV2.13:bd11/16/2012:svnAcer:pnAspireV5-571P:pvrV2.13:r
[Kernel-packages] [Bug 1309462] Re: Intel Ivybridge Mobile graphics backlight not adjustable
** Attachment added: "fwts_method" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+attachment/4087233/+files/fwts_method -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1309462 Title: Intel Ivybridge Mobile graphics backlight not adjustable Status in “linux” package in Ubuntu: Confirmed Bug description: On an Acer Aspire V5 with Intel Graphics, backlight control is not working. Both on Ubuntu GNOME 13.10 and 14.04 neither hotkeys or adjusting the applet slider has any effect. Note that the hotkeys Fn+Left and Fn+Right DO result in a moving slider indicator (this will change after testing with kernel parameters!) but no actual backlight change. Following https://wiki.ubuntu.com/Kernel/Debugging/Backlight "Testing for a workaround" here are my findings. More debugging info will be attached later. TESTING FOR A WORK AROUND > Reboot with only the kernel parameter acpi_backlight=vendor : > Make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > sudo su > echo 8 > /sys/class/backlight/intel_backlight/brightness > Please comment on if the brightness changes. Yes > Reboot with just kernel parameter video.use_bios_initial_backlight=0 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If using a v3.13.x+ series kernel, reboot with just kernel parameter video.use_native_backlight=1 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If your backlight hotkeys are Fn+Left and Fn+Right, add kernel parameter atkbd.softraw=0 to /boot/grub/menu.lst They are so I did (not /boot/grub/menu.lst but /etc/default/grub though...) and I rebooted even though it is not written I should... > Then, switch to any console, e.g. Ctrl+Alt+F1, login by root account and execute: showkey -s I did (after reboot mentioned above) and found that the hotkeys do not give any output at all anymore... Strange. So I reverted all changed above and rebooted with only "quiet splash" boot parameters but still the hotkeys remain dead. Not even the faux brightness slider change anymore. Very strange! * please note that there is no brightness applet in Ubuntu GNOME 14.04 but going to the Settings > Screen Brightness & Lock the brightness can now be controlled BASIC DEBUGGING INFORMATION (all files will be attached later) $ ls /sys/class/backlight intel_backlight Note that this used to list video0_backlight (as I remember it) too but after testing and reverting (!) that entry remains gone. Strange. $ dmesg | grep 'ACPI: Video' [2.969975] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) $ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) $ cat /proc/version Linux version 3.13.0-24-generic (buildd@panlong) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-24-generic 3.13.0-24.46 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: ravanhagen 1918 F pulseaudio CurrentDesktop: GNOME Date: Fri Apr 18 12:03:12 2014 EcryptfsInUse: Yes InstallationDate: Installed on 2014-04-14 (3 days ago) InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Daily amd64 (20140406) MachineType: Acer Aspire V5-571P ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=631fc653-5697-44cb-b877-f6cae0fda9cf ro acpi_backlight=vendor quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/16/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: V2.13 dmi.board.asset.tag: No Asset Tag dmi.board.name: Aspire V5-571P dmi.board.vendor: Acer dmi.board.version: V2.13 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Acer dmi.chassis.version: V2.13 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrV2.13:bd11/16/2012:svnAcer:pnAspireV5-571P:pvrV2.13:rvnAcer:rnAspireV5-571P:rvrV2.13:cvnAcer:ct9:cvrV2.13: dmi.product.name: Aspire V5-571P dmi.product.version: V2.13 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+subscriptions -
[Kernel-packages] [Bug 1309462] Re: Intel Ivybridge Mobile graphics backlight not adjustable
** Attachment added: "dmidecode.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+attachment/4087235/+files/dmidecode.log -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1309462 Title: Intel Ivybridge Mobile graphics backlight not adjustable Status in “linux” package in Ubuntu: Confirmed Bug description: On an Acer Aspire V5 with Intel Graphics, backlight control is not working. Both on Ubuntu GNOME 13.10 and 14.04 neither hotkeys or adjusting the applet slider has any effect. Note that the hotkeys Fn+Left and Fn+Right DO result in a moving slider indicator (this will change after testing with kernel parameters!) but no actual backlight change. Following https://wiki.ubuntu.com/Kernel/Debugging/Backlight "Testing for a workaround" here are my findings. More debugging info will be attached later. TESTING FOR A WORK AROUND > Reboot with only the kernel parameter acpi_backlight=vendor : > Make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > sudo su > echo 8 > /sys/class/backlight/intel_backlight/brightness > Please comment on if the brightness changes. Yes > Reboot with just kernel parameter video.use_bios_initial_backlight=0 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If using a v3.13.x+ series kernel, reboot with just kernel parameter video.use_native_backlight=1 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If your backlight hotkeys are Fn+Left and Fn+Right, add kernel parameter atkbd.softraw=0 to /boot/grub/menu.lst They are so I did (not /boot/grub/menu.lst but /etc/default/grub though...) and I rebooted even though it is not written I should... > Then, switch to any console, e.g. Ctrl+Alt+F1, login by root account and execute: showkey -s I did (after reboot mentioned above) and found that the hotkeys do not give any output at all anymore... Strange. So I reverted all changed above and rebooted with only "quiet splash" boot parameters but still the hotkeys remain dead. Not even the faux brightness slider change anymore. Very strange! * please note that there is no brightness applet in Ubuntu GNOME 14.04 but going to the Settings > Screen Brightness & Lock the brightness can now be controlled BASIC DEBUGGING INFORMATION (all files will be attached later) $ ls /sys/class/backlight intel_backlight Note that this used to list video0_backlight (as I remember it) too but after testing and reverting (!) that entry remains gone. Strange. $ dmesg | grep 'ACPI: Video' [2.969975] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) $ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) $ cat /proc/version Linux version 3.13.0-24-generic (buildd@panlong) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-24-generic 3.13.0-24.46 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: ravanhagen 1918 F pulseaudio CurrentDesktop: GNOME Date: Fri Apr 18 12:03:12 2014 EcryptfsInUse: Yes InstallationDate: Installed on 2014-04-14 (3 days ago) InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Daily amd64 (20140406) MachineType: Acer Aspire V5-571P ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=631fc653-5697-44cb-b877-f6cae0fda9cf ro acpi_backlight=vendor quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/16/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: V2.13 dmi.board.asset.tag: No Asset Tag dmi.board.name: Aspire V5-571P dmi.board.vendor: Acer dmi.board.version: V2.13 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Acer dmi.chassis.version: V2.13 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrV2.13:bd11/16/2012:svnAcer:pnAspireV5-571P:pvrV2.13:rvnAcer:rnAspireV5-571P:rvrV2.13:cvnAcer:ct9:cvrV2.13: dmi.product.name: Aspire V5-571P dmi.product.version: V2.13 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+subscription
[Kernel-packages] [Bug 1309462] Re: Intel Ivybridge Mobile graphics backlight not adjustable
$ sudo fwts Running 42 tests, results appended to results.log ** Attachment added: "results.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+attachment/4087232/+files/results.log -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1309462 Title: Intel Ivybridge Mobile graphics backlight not adjustable Status in “linux” package in Ubuntu: Confirmed Bug description: On an Acer Aspire V5 with Intel Graphics, backlight control is not working. Both on Ubuntu GNOME 13.10 and 14.04 neither hotkeys or adjusting the applet slider has any effect. Note that the hotkeys Fn+Left and Fn+Right DO result in a moving slider indicator (this will change after testing with kernel parameters!) but no actual backlight change. Following https://wiki.ubuntu.com/Kernel/Debugging/Backlight "Testing for a workaround" here are my findings. More debugging info will be attached later. TESTING FOR A WORK AROUND > Reboot with only the kernel parameter acpi_backlight=vendor : > Make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > sudo su > echo 8 > /sys/class/backlight/intel_backlight/brightness > Please comment on if the brightness changes. Yes > Reboot with just kernel parameter video.use_bios_initial_backlight=0 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If using a v3.13.x+ series kernel, reboot with just kernel parameter video.use_native_backlight=1 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If your backlight hotkeys are Fn+Left and Fn+Right, add kernel parameter atkbd.softraw=0 to /boot/grub/menu.lst They are so I did (not /boot/grub/menu.lst but /etc/default/grub though...) and I rebooted even though it is not written I should... > Then, switch to any console, e.g. Ctrl+Alt+F1, login by root account and execute: showkey -s I did (after reboot mentioned above) and found that the hotkeys do not give any output at all anymore... Strange. So I reverted all changed above and rebooted with only "quiet splash" boot parameters but still the hotkeys remain dead. Not even the faux brightness slider change anymore. Very strange! * please note that there is no brightness applet in Ubuntu GNOME 14.04 but going to the Settings > Screen Brightness & Lock the brightness can now be controlled BASIC DEBUGGING INFORMATION (all files will be attached later) $ ls /sys/class/backlight intel_backlight Note that this used to list video0_backlight (as I remember it) too but after testing and reverting (!) that entry remains gone. Strange. $ dmesg | grep 'ACPI: Video' [2.969975] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) $ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) $ cat /proc/version Linux version 3.13.0-24-generic (buildd@panlong) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-24-generic 3.13.0-24.46 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: ravanhagen 1918 F pulseaudio CurrentDesktop: GNOME Date: Fri Apr 18 12:03:12 2014 EcryptfsInUse: Yes InstallationDate: Installed on 2014-04-14 (3 days ago) InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Daily amd64 (20140406) MachineType: Acer Aspire V5-571P ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=631fc653-5697-44cb-b877-f6cae0fda9cf ro acpi_backlight=vendor quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/16/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: V2.13 dmi.board.asset.tag: No Asset Tag dmi.board.name: Aspire V5-571P dmi.board.vendor: Acer dmi.board.version: V2.13 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Acer dmi.chassis.version: V2.13 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrV2.13:bd11/16/2012:svnAcer:pnAspireV5-571P:pvrV2.13:rvnAcer:rnAspireV5-571P:rvrV2.13:cvnAcer:ct9:cvrV2.13: dmi.product.name: Aspire V5-571P dmi.product.version: V2.13 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.l
[Kernel-packages] [Bug 1309462] Re: Intel Ivybridge Mobile graphics backlight not adjustable
** Attachment added: "dsdt.dsl" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+attachment/4087223/+files/dsdt.dsl -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1309462 Title: Intel Ivybridge Mobile graphics backlight not adjustable Status in “linux” package in Ubuntu: Confirmed Bug description: On an Acer Aspire V5 with Intel Graphics, backlight control is not working. Both on Ubuntu GNOME 13.10 and 14.04 neither hotkeys or adjusting the applet slider has any effect. Note that the hotkeys Fn+Left and Fn+Right DO result in a moving slider indicator (this will change after testing with kernel parameters!) but no actual backlight change. Following https://wiki.ubuntu.com/Kernel/Debugging/Backlight "Testing for a workaround" here are my findings. More debugging info will be attached later. TESTING FOR A WORK AROUND > Reboot with only the kernel parameter acpi_backlight=vendor : > Make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > sudo su > echo 8 > /sys/class/backlight/intel_backlight/brightness > Please comment on if the brightness changes. Yes > Reboot with just kernel parameter video.use_bios_initial_backlight=0 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If using a v3.13.x+ series kernel, reboot with just kernel parameter video.use_native_backlight=1 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If your backlight hotkeys are Fn+Left and Fn+Right, add kernel parameter atkbd.softraw=0 to /boot/grub/menu.lst They are so I did (not /boot/grub/menu.lst but /etc/default/grub though...) and I rebooted even though it is not written I should... > Then, switch to any console, e.g. Ctrl+Alt+F1, login by root account and execute: showkey -s I did (after reboot mentioned above) and found that the hotkeys do not give any output at all anymore... Strange. So I reverted all changed above and rebooted with only "quiet splash" boot parameters but still the hotkeys remain dead. Not even the faux brightness slider change anymore. Very strange! * please note that there is no brightness applet in Ubuntu GNOME 14.04 but going to the Settings > Screen Brightness & Lock the brightness can now be controlled BASIC DEBUGGING INFORMATION (all files will be attached later) $ ls /sys/class/backlight intel_backlight Note that this used to list video0_backlight (as I remember it) too but after testing and reverting (!) that entry remains gone. Strange. $ dmesg | grep 'ACPI: Video' [2.969975] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) $ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) $ cat /proc/version Linux version 3.13.0-24-generic (buildd@panlong) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-24-generic 3.13.0-24.46 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: ravanhagen 1918 F pulseaudio CurrentDesktop: GNOME Date: Fri Apr 18 12:03:12 2014 EcryptfsInUse: Yes InstallationDate: Installed on 2014-04-14 (3 days ago) InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Daily amd64 (20140406) MachineType: Acer Aspire V5-571P ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=631fc653-5697-44cb-b877-f6cae0fda9cf ro acpi_backlight=vendor quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/16/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: V2.13 dmi.board.asset.tag: No Asset Tag dmi.board.name: Aspire V5-571P dmi.board.vendor: Acer dmi.board.version: V2.13 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Acer dmi.chassis.version: V2.13 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrV2.13:bd11/16/2012:svnAcer:pnAspireV5-571P:pvrV2.13:rvnAcer:rnAspireV5-571P:rvrV2.13:cvnAcer:ct9:cvrV2.13: dmi.product.name: Aspire V5-571P dmi.product.version: V2.13 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+subscriptions -- Mai
[Kernel-packages] [Bug 1309462] Re: Intel Ivybridge Mobile graphics backlight not adjustable
** Attachment added: "ssdt6.dat" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+attachment/4087221/+files/ssdt6.dat -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1309462 Title: Intel Ivybridge Mobile graphics backlight not adjustable Status in “linux” package in Ubuntu: Confirmed Bug description: On an Acer Aspire V5 with Intel Graphics, backlight control is not working. Both on Ubuntu GNOME 13.10 and 14.04 neither hotkeys or adjusting the applet slider has any effect. Note that the hotkeys Fn+Left and Fn+Right DO result in a moving slider indicator (this will change after testing with kernel parameters!) but no actual backlight change. Following https://wiki.ubuntu.com/Kernel/Debugging/Backlight "Testing for a workaround" here are my findings. More debugging info will be attached later. TESTING FOR A WORK AROUND > Reboot with only the kernel parameter acpi_backlight=vendor : > Make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > sudo su > echo 8 > /sys/class/backlight/intel_backlight/brightness > Please comment on if the brightness changes. Yes > Reboot with just kernel parameter video.use_bios_initial_backlight=0 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If using a v3.13.x+ series kernel, reboot with just kernel parameter video.use_native_backlight=1 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If your backlight hotkeys are Fn+Left and Fn+Right, add kernel parameter atkbd.softraw=0 to /boot/grub/menu.lst They are so I did (not /boot/grub/menu.lst but /etc/default/grub though...) and I rebooted even though it is not written I should... > Then, switch to any console, e.g. Ctrl+Alt+F1, login by root account and execute: showkey -s I did (after reboot mentioned above) and found that the hotkeys do not give any output at all anymore... Strange. So I reverted all changed above and rebooted with only "quiet splash" boot parameters but still the hotkeys remain dead. Not even the faux brightness slider change anymore. Very strange! * please note that there is no brightness applet in Ubuntu GNOME 14.04 but going to the Settings > Screen Brightness & Lock the brightness can now be controlled BASIC DEBUGGING INFORMATION (all files will be attached later) $ ls /sys/class/backlight intel_backlight Note that this used to list video0_backlight (as I remember it) too but after testing and reverting (!) that entry remains gone. Strange. $ dmesg | grep 'ACPI: Video' [2.969975] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) $ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) $ cat /proc/version Linux version 3.13.0-24-generic (buildd@panlong) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-24-generic 3.13.0-24.46 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: ravanhagen 1918 F pulseaudio CurrentDesktop: GNOME Date: Fri Apr 18 12:03:12 2014 EcryptfsInUse: Yes InstallationDate: Installed on 2014-04-14 (3 days ago) InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Daily amd64 (20140406) MachineType: Acer Aspire V5-571P ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=631fc653-5697-44cb-b877-f6cae0fda9cf ro acpi_backlight=vendor quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/16/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: V2.13 dmi.board.asset.tag: No Asset Tag dmi.board.name: Aspire V5-571P dmi.board.vendor: Acer dmi.board.version: V2.13 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Acer dmi.chassis.version: V2.13 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrV2.13:bd11/16/2012:svnAcer:pnAspireV5-571P:pvrV2.13:rvnAcer:rnAspireV5-571P:rvrV2.13:cvnAcer:ct9:cvrV2.13: dmi.product.name: Aspire V5-571P dmi.product.version: V2.13 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+subscriptions -- M
[Kernel-packages] [Bug 1309462] Re: Intel Ivybridge Mobile graphics backlight not adjustable
** Attachment added: "ssdt5.dat" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+attachment/4087220/+files/ssdt5.dat -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1309462 Title: Intel Ivybridge Mobile graphics backlight not adjustable Status in “linux” package in Ubuntu: Confirmed Bug description: On an Acer Aspire V5 with Intel Graphics, backlight control is not working. Both on Ubuntu GNOME 13.10 and 14.04 neither hotkeys or adjusting the applet slider has any effect. Note that the hotkeys Fn+Left and Fn+Right DO result in a moving slider indicator (this will change after testing with kernel parameters!) but no actual backlight change. Following https://wiki.ubuntu.com/Kernel/Debugging/Backlight "Testing for a workaround" here are my findings. More debugging info will be attached later. TESTING FOR A WORK AROUND > Reboot with only the kernel parameter acpi_backlight=vendor : > Make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > sudo su > echo 8 > /sys/class/backlight/intel_backlight/brightness > Please comment on if the brightness changes. Yes > Reboot with just kernel parameter video.use_bios_initial_backlight=0 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If using a v3.13.x+ series kernel, reboot with just kernel parameter video.use_native_backlight=1 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If your backlight hotkeys are Fn+Left and Fn+Right, add kernel parameter atkbd.softraw=0 to /boot/grub/menu.lst They are so I did (not /boot/grub/menu.lst but /etc/default/grub though...) and I rebooted even though it is not written I should... > Then, switch to any console, e.g. Ctrl+Alt+F1, login by root account and execute: showkey -s I did (after reboot mentioned above) and found that the hotkeys do not give any output at all anymore... Strange. So I reverted all changed above and rebooted with only "quiet splash" boot parameters but still the hotkeys remain dead. Not even the faux brightness slider change anymore. Very strange! * please note that there is no brightness applet in Ubuntu GNOME 14.04 but going to the Settings > Screen Brightness & Lock the brightness can now be controlled BASIC DEBUGGING INFORMATION (all files will be attached later) $ ls /sys/class/backlight intel_backlight Note that this used to list video0_backlight (as I remember it) too but after testing and reverting (!) that entry remains gone. Strange. $ dmesg | grep 'ACPI: Video' [2.969975] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) $ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) $ cat /proc/version Linux version 3.13.0-24-generic (buildd@panlong) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-24-generic 3.13.0-24.46 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: ravanhagen 1918 F pulseaudio CurrentDesktop: GNOME Date: Fri Apr 18 12:03:12 2014 EcryptfsInUse: Yes InstallationDate: Installed on 2014-04-14 (3 days ago) InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Daily amd64 (20140406) MachineType: Acer Aspire V5-571P ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=631fc653-5697-44cb-b877-f6cae0fda9cf ro acpi_backlight=vendor quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/16/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: V2.13 dmi.board.asset.tag: No Asset Tag dmi.board.name: Aspire V5-571P dmi.board.vendor: Acer dmi.board.version: V2.13 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Acer dmi.chassis.version: V2.13 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrV2.13:bd11/16/2012:svnAcer:pnAspireV5-571P:pvrV2.13:rvnAcer:rnAspireV5-571P:rvrV2.13:cvnAcer:ct9:cvrV2.13: dmi.product.name: Aspire V5-571P dmi.product.version: V2.13 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+subscriptions -- M
[Kernel-packages] [Bug 1309462] Re: Intel Ivybridge Mobile graphics backlight not adjustable
** Attachment added: "ssdt4.dat" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+attachment/4087219/+files/ssdt4.dat -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1309462 Title: Intel Ivybridge Mobile graphics backlight not adjustable Status in “linux” package in Ubuntu: Confirmed Bug description: On an Acer Aspire V5 with Intel Graphics, backlight control is not working. Both on Ubuntu GNOME 13.10 and 14.04 neither hotkeys or adjusting the applet slider has any effect. Note that the hotkeys Fn+Left and Fn+Right DO result in a moving slider indicator (this will change after testing with kernel parameters!) but no actual backlight change. Following https://wiki.ubuntu.com/Kernel/Debugging/Backlight "Testing for a workaround" here are my findings. More debugging info will be attached later. TESTING FOR A WORK AROUND > Reboot with only the kernel parameter acpi_backlight=vendor : > Make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > sudo su > echo 8 > /sys/class/backlight/intel_backlight/brightness > Please comment on if the brightness changes. Yes > Reboot with just kernel parameter video.use_bios_initial_backlight=0 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If using a v3.13.x+ series kernel, reboot with just kernel parameter video.use_native_backlight=1 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If your backlight hotkeys are Fn+Left and Fn+Right, add kernel parameter atkbd.softraw=0 to /boot/grub/menu.lst They are so I did (not /boot/grub/menu.lst but /etc/default/grub though...) and I rebooted even though it is not written I should... > Then, switch to any console, e.g. Ctrl+Alt+F1, login by root account and execute: showkey -s I did (after reboot mentioned above) and found that the hotkeys do not give any output at all anymore... Strange. So I reverted all changed above and rebooted with only "quiet splash" boot parameters but still the hotkeys remain dead. Not even the faux brightness slider change anymore. Very strange! * please note that there is no brightness applet in Ubuntu GNOME 14.04 but going to the Settings > Screen Brightness & Lock the brightness can now be controlled BASIC DEBUGGING INFORMATION (all files will be attached later) $ ls /sys/class/backlight intel_backlight Note that this used to list video0_backlight (as I remember it) too but after testing and reverting (!) that entry remains gone. Strange. $ dmesg | grep 'ACPI: Video' [2.969975] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) $ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) $ cat /proc/version Linux version 3.13.0-24-generic (buildd@panlong) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-24-generic 3.13.0-24.46 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: ravanhagen 1918 F pulseaudio CurrentDesktop: GNOME Date: Fri Apr 18 12:03:12 2014 EcryptfsInUse: Yes InstallationDate: Installed on 2014-04-14 (3 days ago) InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Daily amd64 (20140406) MachineType: Acer Aspire V5-571P ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=631fc653-5697-44cb-b877-f6cae0fda9cf ro acpi_backlight=vendor quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/16/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: V2.13 dmi.board.asset.tag: No Asset Tag dmi.board.name: Aspire V5-571P dmi.board.vendor: Acer dmi.board.version: V2.13 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Acer dmi.chassis.version: V2.13 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrV2.13:bd11/16/2012:svnAcer:pnAspireV5-571P:pvrV2.13:rvnAcer:rnAspireV5-571P:rvrV2.13:cvnAcer:ct9:cvrV2.13: dmi.product.name: Aspire V5-571P dmi.product.version: V2.13 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+subscriptions -- M
[Kernel-packages] [Bug 1309462] Re: Intel Ivybridge Mobile graphics backlight not adjustable
** Attachment added: "ssdt2.dat" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+attachment/4087211/+files/ssdt2.dat -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1309462 Title: Intel Ivybridge Mobile graphics backlight not adjustable Status in “linux” package in Ubuntu: Confirmed Bug description: On an Acer Aspire V5 with Intel Graphics, backlight control is not working. Both on Ubuntu GNOME 13.10 and 14.04 neither hotkeys or adjusting the applet slider has any effect. Note that the hotkeys Fn+Left and Fn+Right DO result in a moving slider indicator (this will change after testing with kernel parameters!) but no actual backlight change. Following https://wiki.ubuntu.com/Kernel/Debugging/Backlight "Testing for a workaround" here are my findings. More debugging info will be attached later. TESTING FOR A WORK AROUND > Reboot with only the kernel parameter acpi_backlight=vendor : > Make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > sudo su > echo 8 > /sys/class/backlight/intel_backlight/brightness > Please comment on if the brightness changes. Yes > Reboot with just kernel parameter video.use_bios_initial_backlight=0 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If using a v3.13.x+ series kernel, reboot with just kernel parameter video.use_native_backlight=1 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If your backlight hotkeys are Fn+Left and Fn+Right, add kernel parameter atkbd.softraw=0 to /boot/grub/menu.lst They are so I did (not /boot/grub/menu.lst but /etc/default/grub though...) and I rebooted even though it is not written I should... > Then, switch to any console, e.g. Ctrl+Alt+F1, login by root account and execute: showkey -s I did (after reboot mentioned above) and found that the hotkeys do not give any output at all anymore... Strange. So I reverted all changed above and rebooted with only "quiet splash" boot parameters but still the hotkeys remain dead. Not even the faux brightness slider change anymore. Very strange! * please note that there is no brightness applet in Ubuntu GNOME 14.04 but going to the Settings > Screen Brightness & Lock the brightness can now be controlled BASIC DEBUGGING INFORMATION (all files will be attached later) $ ls /sys/class/backlight intel_backlight Note that this used to list video0_backlight (as I remember it) too but after testing and reverting (!) that entry remains gone. Strange. $ dmesg | grep 'ACPI: Video' [2.969975] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) $ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) $ cat /proc/version Linux version 3.13.0-24-generic (buildd@panlong) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-24-generic 3.13.0-24.46 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: ravanhagen 1918 F pulseaudio CurrentDesktop: GNOME Date: Fri Apr 18 12:03:12 2014 EcryptfsInUse: Yes InstallationDate: Installed on 2014-04-14 (3 days ago) InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Daily amd64 (20140406) MachineType: Acer Aspire V5-571P ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=631fc653-5697-44cb-b877-f6cae0fda9cf ro acpi_backlight=vendor quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/16/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: V2.13 dmi.board.asset.tag: No Asset Tag dmi.board.name: Aspire V5-571P dmi.board.vendor: Acer dmi.board.version: V2.13 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Acer dmi.chassis.version: V2.13 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrV2.13:bd11/16/2012:svnAcer:pnAspireV5-571P:pvrV2.13:rvnAcer:rnAspireV5-571P:rvrV2.13:cvnAcer:ct9:cvrV2.13: dmi.product.name: Aspire V5-571P dmi.product.version: V2.13 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+subscriptions -- M
[Kernel-packages] [Bug 1309462] Re: Intel Ivybridge Mobile graphics backlight not adjustable
** Attachment added: "ssdt1.dat" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+attachment/4087210/+files/ssdt1.dat -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1309462 Title: Intel Ivybridge Mobile graphics backlight not adjustable Status in “linux” package in Ubuntu: Confirmed Bug description: On an Acer Aspire V5 with Intel Graphics, backlight control is not working. Both on Ubuntu GNOME 13.10 and 14.04 neither hotkeys or adjusting the applet slider has any effect. Note that the hotkeys Fn+Left and Fn+Right DO result in a moving slider indicator (this will change after testing with kernel parameters!) but no actual backlight change. Following https://wiki.ubuntu.com/Kernel/Debugging/Backlight "Testing for a workaround" here are my findings. More debugging info will be attached later. TESTING FOR A WORK AROUND > Reboot with only the kernel parameter acpi_backlight=vendor : > Make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > sudo su > echo 8 > /sys/class/backlight/intel_backlight/brightness > Please comment on if the brightness changes. Yes > Reboot with just kernel parameter video.use_bios_initial_backlight=0 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If using a v3.13.x+ series kernel, reboot with just kernel parameter video.use_native_backlight=1 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If your backlight hotkeys are Fn+Left and Fn+Right, add kernel parameter atkbd.softraw=0 to /boot/grub/menu.lst They are so I did (not /boot/grub/menu.lst but /etc/default/grub though...) and I rebooted even though it is not written I should... > Then, switch to any console, e.g. Ctrl+Alt+F1, login by root account and execute: showkey -s I did (after reboot mentioned above) and found that the hotkeys do not give any output at all anymore... Strange. So I reverted all changed above and rebooted with only "quiet splash" boot parameters but still the hotkeys remain dead. Not even the faux brightness slider change anymore. Very strange! * please note that there is no brightness applet in Ubuntu GNOME 14.04 but going to the Settings > Screen Brightness & Lock the brightness can now be controlled BASIC DEBUGGING INFORMATION (all files will be attached later) $ ls /sys/class/backlight intel_backlight Note that this used to list video0_backlight (as I remember it) too but after testing and reverting (!) that entry remains gone. Strange. $ dmesg | grep 'ACPI: Video' [2.969975] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) $ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) $ cat /proc/version Linux version 3.13.0-24-generic (buildd@panlong) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-24-generic 3.13.0-24.46 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: ravanhagen 1918 F pulseaudio CurrentDesktop: GNOME Date: Fri Apr 18 12:03:12 2014 EcryptfsInUse: Yes InstallationDate: Installed on 2014-04-14 (3 days ago) InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Daily amd64 (20140406) MachineType: Acer Aspire V5-571P ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=631fc653-5697-44cb-b877-f6cae0fda9cf ro acpi_backlight=vendor quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/16/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: V2.13 dmi.board.asset.tag: No Asset Tag dmi.board.name: Aspire V5-571P dmi.board.vendor: Acer dmi.board.version: V2.13 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Acer dmi.chassis.version: V2.13 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrV2.13:bd11/16/2012:svnAcer:pnAspireV5-571P:pvrV2.13:rvnAcer:rnAspireV5-571P:rvrV2.13:cvnAcer:ct9:cvrV2.13: dmi.product.name: Aspire V5-571P dmi.product.version: V2.13 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+subscriptions -- M
[Kernel-packages] [Bug 1309462] Re: Intel Ivybridge Mobile graphics backlight not adjustable
** Attachment added: "ssdt3.dat" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+attachment/4087218/+files/ssdt3.dat -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1309462 Title: Intel Ivybridge Mobile graphics backlight not adjustable Status in “linux” package in Ubuntu: Confirmed Bug description: On an Acer Aspire V5 with Intel Graphics, backlight control is not working. Both on Ubuntu GNOME 13.10 and 14.04 neither hotkeys or adjusting the applet slider has any effect. Note that the hotkeys Fn+Left and Fn+Right DO result in a moving slider indicator (this will change after testing with kernel parameters!) but no actual backlight change. Following https://wiki.ubuntu.com/Kernel/Debugging/Backlight "Testing for a workaround" here are my findings. More debugging info will be attached later. TESTING FOR A WORK AROUND > Reboot with only the kernel parameter acpi_backlight=vendor : > Make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > sudo su > echo 8 > /sys/class/backlight/intel_backlight/brightness > Please comment on if the brightness changes. Yes > Reboot with just kernel parameter video.use_bios_initial_backlight=0 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If using a v3.13.x+ series kernel, reboot with just kernel parameter video.use_native_backlight=1 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If your backlight hotkeys are Fn+Left and Fn+Right, add kernel parameter atkbd.softraw=0 to /boot/grub/menu.lst They are so I did (not /boot/grub/menu.lst but /etc/default/grub though...) and I rebooted even though it is not written I should... > Then, switch to any console, e.g. Ctrl+Alt+F1, login by root account and execute: showkey -s I did (after reboot mentioned above) and found that the hotkeys do not give any output at all anymore... Strange. So I reverted all changed above and rebooted with only "quiet splash" boot parameters but still the hotkeys remain dead. Not even the faux brightness slider change anymore. Very strange! * please note that there is no brightness applet in Ubuntu GNOME 14.04 but going to the Settings > Screen Brightness & Lock the brightness can now be controlled BASIC DEBUGGING INFORMATION (all files will be attached later) $ ls /sys/class/backlight intel_backlight Note that this used to list video0_backlight (as I remember it) too but after testing and reverting (!) that entry remains gone. Strange. $ dmesg | grep 'ACPI: Video' [2.969975] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) $ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) $ cat /proc/version Linux version 3.13.0-24-generic (buildd@panlong) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-24-generic 3.13.0-24.46 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: ravanhagen 1918 F pulseaudio CurrentDesktop: GNOME Date: Fri Apr 18 12:03:12 2014 EcryptfsInUse: Yes InstallationDate: Installed on 2014-04-14 (3 days ago) InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Daily amd64 (20140406) MachineType: Acer Aspire V5-571P ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=631fc653-5697-44cb-b877-f6cae0fda9cf ro acpi_backlight=vendor quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/16/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: V2.13 dmi.board.asset.tag: No Asset Tag dmi.board.name: Aspire V5-571P dmi.board.vendor: Acer dmi.board.version: V2.13 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Acer dmi.chassis.version: V2.13 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrV2.13:bd11/16/2012:svnAcer:pnAspireV5-571P:pvrV2.13:rvnAcer:rnAspireV5-571P:rvrV2.13:cvnAcer:ct9:cvrV2.13: dmi.product.name: Aspire V5-571P dmi.product.version: V2.13 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+subscriptions -- M
[Kernel-packages] [Bug 1309462] Re: Intel Ivybridge Mobile graphics backlight not adjustable
Result of ls /sys/class/backlight > backlight Please note that this is with the default kernel parameters "quiet splash" but AFTER having followed the steps in "Testing for a work around" steps... I'm sure there was another interface listed BEFORE I did the steps. I think it was called video0_backlight but now it is and remains gone. Strange. ** Attachment added: "backlight" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+attachment/4087207/+files/backlight -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1309462 Title: Intel Ivybridge Mobile graphics backlight not adjustable Status in “linux” package in Ubuntu: Confirmed Bug description: On an Acer Aspire V5 with Intel Graphics, backlight control is not working. Both on Ubuntu GNOME 13.10 and 14.04 neither hotkeys or adjusting the applet slider has any effect. Note that the hotkeys Fn+Left and Fn+Right DO result in a moving slider indicator (this will change after testing with kernel parameters!) but no actual backlight change. Following https://wiki.ubuntu.com/Kernel/Debugging/Backlight "Testing for a workaround" here are my findings. More debugging info will be attached later. TESTING FOR A WORK AROUND > Reboot with only the kernel parameter acpi_backlight=vendor : > Make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > sudo su > echo 8 > /sys/class/backlight/intel_backlight/brightness > Please comment on if the brightness changes. Yes > Reboot with just kernel parameter video.use_bios_initial_backlight=0 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If using a v3.13.x+ series kernel, reboot with just kernel parameter video.use_native_backlight=1 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If your backlight hotkeys are Fn+Left and Fn+Right, add kernel parameter atkbd.softraw=0 to /boot/grub/menu.lst They are so I did (not /boot/grub/menu.lst but /etc/default/grub though...) and I rebooted even though it is not written I should... > Then, switch to any console, e.g. Ctrl+Alt+F1, login by root account and execute: showkey -s I did (after reboot mentioned above) and found that the hotkeys do not give any output at all anymore... Strange. So I reverted all changed above and rebooted with only "quiet splash" boot parameters but still the hotkeys remain dead. Not even the faux brightness slider change anymore. Very strange! * please note that there is no brightness applet in Ubuntu GNOME 14.04 but going to the Settings > Screen Brightness & Lock the brightness can now be controlled BASIC DEBUGGING INFORMATION (all files will be attached later) $ ls /sys/class/backlight intel_backlight Note that this used to list video0_backlight (as I remember it) too but after testing and reverting (!) that entry remains gone. Strange. $ dmesg | grep 'ACPI: Video' [2.969975] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) $ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) $ cat /proc/version Linux version 3.13.0-24-generic (buildd@panlong) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-24-generic 3.13.0-24.46 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: ravanhagen 1918 F pulseaudio CurrentDesktop: GNOME Date: Fri Apr 18 12:03:12 2014 EcryptfsInUse: Yes InstallationDate: Installed on 2014-04-14 (3 days ago) InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Daily amd64 (20140406) MachineType: Acer Aspire V5-571P ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=631fc653-5697-44cb-b877-f6cae0fda9cf ro acpi_backlight=vendor quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/16/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: V2.13 dmi.board.asset.tag: No Asset Tag dmi.board.name: Aspire V5-571P dmi.board.vendor: Acer dmi.board.version: V2.13 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Acer dmi.chassis.version: V2.13 dmi.modalias: dmi:bvnPho
[Kernel-packages] [Bug 1309462] Re: Intel Ivybridge Mobile graphics backlight not adjustable
** Attachment added: "acpidump.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+attachment/4087208/+files/acpidump.txt -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1309462 Title: Intel Ivybridge Mobile graphics backlight not adjustable Status in “linux” package in Ubuntu: Confirmed Bug description: On an Acer Aspire V5 with Intel Graphics, backlight control is not working. Both on Ubuntu GNOME 13.10 and 14.04 neither hotkeys or adjusting the applet slider has any effect. Note that the hotkeys Fn+Left and Fn+Right DO result in a moving slider indicator (this will change after testing with kernel parameters!) but no actual backlight change. Following https://wiki.ubuntu.com/Kernel/Debugging/Backlight "Testing for a workaround" here are my findings. More debugging info will be attached later. TESTING FOR A WORK AROUND > Reboot with only the kernel parameter acpi_backlight=vendor : > Make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > sudo su > echo 8 > /sys/class/backlight/intel_backlight/brightness > Please comment on if the brightness changes. Yes > Reboot with just kernel parameter video.use_bios_initial_backlight=0 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If using a v3.13.x+ series kernel, reboot with just kernel parameter video.use_native_backlight=1 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If your backlight hotkeys are Fn+Left and Fn+Right, add kernel parameter atkbd.softraw=0 to /boot/grub/menu.lst They are so I did (not /boot/grub/menu.lst but /etc/default/grub though...) and I rebooted even though it is not written I should... > Then, switch to any console, e.g. Ctrl+Alt+F1, login by root account and execute: showkey -s I did (after reboot mentioned above) and found that the hotkeys do not give any output at all anymore... Strange. So I reverted all changed above and rebooted with only "quiet splash" boot parameters but still the hotkeys remain dead. Not even the faux brightness slider change anymore. Very strange! * please note that there is no brightness applet in Ubuntu GNOME 14.04 but going to the Settings > Screen Brightness & Lock the brightness can now be controlled BASIC DEBUGGING INFORMATION (all files will be attached later) $ ls /sys/class/backlight intel_backlight Note that this used to list video0_backlight (as I remember it) too but after testing and reverting (!) that entry remains gone. Strange. $ dmesg | grep 'ACPI: Video' [2.969975] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) $ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) $ cat /proc/version Linux version 3.13.0-24-generic (buildd@panlong) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-24-generic 3.13.0-24.46 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: ravanhagen 1918 F pulseaudio CurrentDesktop: GNOME Date: Fri Apr 18 12:03:12 2014 EcryptfsInUse: Yes InstallationDate: Installed on 2014-04-14 (3 days ago) InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Daily amd64 (20140406) MachineType: Acer Aspire V5-571P ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=631fc653-5697-44cb-b877-f6cae0fda9cf ro acpi_backlight=vendor quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/16/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: V2.13 dmi.board.asset.tag: No Asset Tag dmi.board.name: Aspire V5-571P dmi.board.vendor: Acer dmi.board.version: V2.13 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Acer dmi.chassis.version: V2.13 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrV2.13:bd11/16/2012:svnAcer:pnAspireV5-571P:pvrV2.13:rvnAcer:rnAspireV5-571P:rvrV2.13:cvnAcer:ct9:cvrV2.13: dmi.product.name: Aspire V5-571P dmi.product.version: V2.13 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+subscriptions
[Kernel-packages] [Bug 1309462] Re: Intel Ivybridge Mobile graphics backlight not adjustable
** Attachment added: "dsdt.dat" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+attachment/4087209/+files/dsdt.dat -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1309462 Title: Intel Ivybridge Mobile graphics backlight not adjustable Status in “linux” package in Ubuntu: Confirmed Bug description: On an Acer Aspire V5 with Intel Graphics, backlight control is not working. Both on Ubuntu GNOME 13.10 and 14.04 neither hotkeys or adjusting the applet slider has any effect. Note that the hotkeys Fn+Left and Fn+Right DO result in a moving slider indicator (this will change after testing with kernel parameters!) but no actual backlight change. Following https://wiki.ubuntu.com/Kernel/Debugging/Backlight "Testing for a workaround" here are my findings. More debugging info will be attached later. TESTING FOR A WORK AROUND > Reboot with only the kernel parameter acpi_backlight=vendor : > Make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > sudo su > echo 8 > /sys/class/backlight/intel_backlight/brightness > Please comment on if the brightness changes. Yes > Reboot with just kernel parameter video.use_bios_initial_backlight=0 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If using a v3.13.x+ series kernel, reboot with just kernel parameter video.use_native_backlight=1 > and make a comment on if you can now alter the backlight with hotkeys or a brightness applet. No / Yes * > If your backlight hotkeys are Fn+Left and Fn+Right, add kernel parameter atkbd.softraw=0 to /boot/grub/menu.lst They are so I did (not /boot/grub/menu.lst but /etc/default/grub though...) and I rebooted even though it is not written I should... > Then, switch to any console, e.g. Ctrl+Alt+F1, login by root account and execute: showkey -s I did (after reboot mentioned above) and found that the hotkeys do not give any output at all anymore... Strange. So I reverted all changed above and rebooted with only "quiet splash" boot parameters but still the hotkeys remain dead. Not even the faux brightness slider change anymore. Very strange! * please note that there is no brightness applet in Ubuntu GNOME 14.04 but going to the Settings > Screen Brightness & Lock the brightness can now be controlled BASIC DEBUGGING INFORMATION (all files will be attached later) $ ls /sys/class/backlight intel_backlight Note that this used to list video0_backlight (as I remember it) too but after testing and reverting (!) that entry remains gone. Strange. $ dmesg | grep 'ACPI: Video' [2.969975] ACPI: Video Device [GFX0] (multi-head: yes rom: no post: no) $ lspci | grep VGA 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) $ cat /proc/version Linux version 3.13.0-24-generic (buildd@panlong) (gcc version 4.8.2 (Ubuntu 4.8.2-19ubuntu1) ) #46-Ubuntu SMP Thu Apr 10 19:11:08 UTC 2014 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-24-generic 3.13.0-24.46 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 AudioDevicesInUse: USERPID ACCESS COMMAND /dev/snd/controlC0: ravanhagen 1918 F pulseaudio CurrentDesktop: GNOME Date: Fri Apr 18 12:03:12 2014 EcryptfsInUse: Yes InstallationDate: Installed on 2014-04-14 (3 days ago) InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Daily amd64 (20140406) MachineType: Acer Aspire V5-571P ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic.efi.signed root=UUID=631fc653-5697-44cb-b877-f6cae0fda9cf ro acpi_backlight=vendor quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.13.0-24-generic N/A linux-backports-modules-3.13.0-24-generic N/A linux-firmware 1.127 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 11/16/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: V2.13 dmi.board.asset.tag: No Asset Tag dmi.board.name: Aspire V5-571P dmi.board.vendor: Acer dmi.board.version: V2.13 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Acer dmi.chassis.version: V2.13 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrV2.13:bd11/16/2012:svnAcer:pnAspireV5-571P:pvrV2.13:rvnAcer:rnAspireV5-571P:rvrV2.13:cvnAcer:ct9:cvrV2.13: dmi.product.name: Aspire V5-571P dmi.product.version: V2.13 dmi.sys.vendor: Acer To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1309462/+subscriptions -- Mai
