I found on dmesg those lines: [ 16.487465] ACPI Warning: 0x0000000000001028-0x000000000000102f SystemIO conflicts with Region \PMIO 1 (20131115/utaddress-251) [ 16.487476] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver [ 16.487481] ACPI Warning: 0x00000000000011b0-0x00000000000011bf SystemIO conflicts with Region \GPIO 1 (20131115/utaddress-251) [ 16.487487] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver [ 16.487489] ACPI Warning: 0x0000000000001180-0x00000000000011af SystemIO conflicts with Region \GPIO 1 (20131115/utaddress-251) [ 16.487495] ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
But obviously I don't have idea of what it means and if can help or not. ** Description changed: When I press the appropriate keys on keyboard (Fn+up/Fn+down) the slider appears on the upper right corner of the screen but the brightness doesn't change. Problem is I have not intel_backlight on /sys/class/backlight folder but just acpi_video0 or dell_backlight (if I set acpi_backlight=vendor on grub). Since I don't have intel_backlight folder I can't apply many of the workaround found here and there. Reported upstream at http://marc.info/?l=linux- acpi&m=139290477319769&w=2 . WORKAROUND: /sys/class/backlight$ for i in /sys/class/backlight/*; do echo -e "\n $i"; cat $i/{brightness,max_brightness,actual_brightness}; done - /sys/class/backlight/dell_backlight + /sys/class/backlight/acpi_video0 1 7 1 - If I increase the backlight the files are correctly updated: - /sys/class/backlight/dell_backlight + If I increase the backlight via funcion keys or terminal the files are + correctly updated: + + $ echo 7 | sudo tee /sys/class/backlight/acpi_video0/brightness + + /sys/class/backlight/acpi_video0 7 7 7 acpi_listen works just on new mainline kernel 3.13.2 (tried bot generic and lowlatency) on stock kernel there isn't output at all: video/brightnessup BRTUP 00000086 00000000 K video/brightnessdown BRTDN 00000087 00000000 K Now I'm using xrandr to change the brightness: xrandr --output LVDS1 --brightness 0.5 but since xrandr is a software overlay my battery life is horrible, I'm stuck on 100% brightness. Beside this, sometimes the brightness slider appears spontaneously without pressing any keys but again with no effect. ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: linux-image-3.11.0-15-generic 3.11.0-15.25 ProcVersionSignature: Ubuntu 3.11.0-15.25-generic 3.11.10 Uname: Linux 3.11.0-15-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.12.5-0ubuntu2.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: effe 1526 F.... pulseaudio CurrentDmesg: [ 102.704995] ERROR @wl_dev_intvar_get : error (-1) [ 102.705003] ERROR @wl_cfg80211_get_tx_power : error (-1) Date: Mon Feb 17 13:27:10 2014 HibernationDevice: RESUME=UUID=d0ee674f-0ea7-47e1-ba6f-1a849ba35941 InstallationDate: Installed on 2014-02-10 (6 days ago) InstallationMedia: Xubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016) MachineType: Dell Inc. Vostro1310 MarkForUpload: True ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-15-generic root=UUID=44ccbe21-7e45-468c-b942-1773a32943b0 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.11.0-15-generic N/A linux-backports-modules-3.11.0-15-generic N/A linux-firmware 1.116.2 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/18/2009 dmi.bios.vendor: Dell Inc. dmi.bios.version: A15 dmi.board.name: 0K866H dmi.board.vendor: Dell Inc. dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: N/A dmi.modalias: dmi:bvnDellInc.:bvrA15:bd03/18/2009:svnDellInc.:pnVostro1310:pvrNull:rvnDellInc.:rn0K866H:rvr:cvnDellInc.:ct8:cvrN/A: dmi.product.name: Vostro1310 dmi.product.version: Null dmi.sys.vendor: Dell Inc. -- 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/1281176 Title: 8086:2a02 [Dell Vostro 1310] no brightness control on (x)ubuntu 13.10 / 14.04 Status in “linux” package in Ubuntu: Triaged Bug description: When I press the appropriate keys on keyboard (Fn+up/Fn+down) the slider appears on the upper right corner of the screen but the brightness doesn't change. Problem is I have not intel_backlight on /sys/class/backlight folder but just acpi_video0 or dell_backlight (if I set acpi_backlight=vendor on grub). Since I don't have intel_backlight folder I can't apply many of the workaround found here and there. Reported upstream at http://marc.info/?l=linux- acpi&m=139290477319769&w=2 . WORKAROUND: /sys/class/backlight$ for i in /sys/class/backlight/*; do echo -e "\n $i"; cat $i/{brightness,max_brightness,actual_brightness}; done /sys/class/backlight/acpi_video0 1 7 1 If I increase the backlight via funcion keys or terminal the files are correctly updated: $ echo 7 | sudo tee /sys/class/backlight/acpi_video0/brightness /sys/class/backlight/acpi_video0 7 7 7 acpi_listen works just on new mainline kernel 3.13.2 (tried bot generic and lowlatency) on stock kernel there isn't output at all: video/brightnessup BRTUP 00000086 00000000 K video/brightnessdown BRTDN 00000087 00000000 K Now I'm using xrandr to change the brightness: xrandr --output LVDS1 --brightness 0.5 but since xrandr is a software overlay my battery life is horrible, I'm stuck on 100% brightness. Beside this, sometimes the brightness slider appears spontaneously without pressing any keys but again with no effect. ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: linux-image-3.11.0-15-generic 3.11.0-15.25 ProcVersionSignature: Ubuntu 3.11.0-15.25-generic 3.11.10 Uname: Linux 3.11.0-15-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.12.5-0ubuntu2.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: effe 1526 F.... pulseaudio CurrentDmesg: [ 102.704995] ERROR @wl_dev_intvar_get : error (-1) [ 102.705003] ERROR @wl_cfg80211_get_tx_power : error (-1) Date: Mon Feb 17 13:27:10 2014 HibernationDevice: RESUME=UUID=d0ee674f-0ea7-47e1-ba6f-1a849ba35941 InstallationDate: Installed on 2014-02-10 (6 days ago) InstallationMedia: Xubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016) MachineType: Dell Inc. Vostro1310 MarkForUpload: True ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.11.0-15-generic root=UUID=44ccbe21-7e45-468c-b942-1773a32943b0 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.11.0-15-generic N/A linux-backports-modules-3.11.0-15-generic N/A linux-firmware 1.116.2 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 03/18/2009 dmi.bios.vendor: Dell Inc. dmi.bios.version: A15 dmi.board.name: 0K866H dmi.board.vendor: Dell Inc. dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: N/A dmi.modalias: dmi:bvnDellInc.:bvrA15:bd03/18/2009:svnDellInc.:pnVostro1310:pvrNull:rvnDellInc.:rn0K866H:rvr:cvnDellInc.:ct8:cvrN/A: dmi.product.name: Vostro1310 dmi.product.version: Null dmi.sys.vendor: Dell Inc. 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