[Bug 1138168] Re: Backlight control regression
** Tags removed: regression ** Tags added: latest-bios-210 regression-release ** Description changed: - Laptop: ASUS A54C-NB91 with BIOS version 210 + Laptop: ASUS A54C-NB91 with BIOS version 210 After the 3.6 kernel + controlling the backlight via software (like xbacklight and the + brightness applet) no longer works as intended (attempting to get + brightness alters the brightness). This was not a Issue on the older + BIOS version (207), but downgrading that is not possible, and ASUS will + not fix it stating the typical we don't support linux on this model On + the 3.6 kernel with the latest BIOS the backlight can't be controlled + via the fn+brightness keys, that still works on the 3.7 kernel and up i + have never had the fn+brightness keys ever update + /sys/class/backlight/acpi_video0/brightness under any tested scenario. - Summary: - After the 3.6 kernel controlling the backlight via software (like xbacklight and the brightness applet) no longer works as intended (attempting to get brightness alters the brightness) - This was not a Issue on the older BIOS version (207), but downgrading that is not possible, and ASUS will not fix it stating the typical we don't support linux on this model - On the 3.6 kernel with the latest BIOS the backlight can't be controlled via the fn+brightness keys, that still works on the 3.7 kernel and up - i have never had the fn+brightness keys ever update /sys/class/backlight/acpi_video0/brightness under any tested scenario - - The PDF file in the attachment was written a week or so ago using 12.10 - with raring's kernels, however it still applies in 13.04 (fresh install - using the march 1st daily iso) - - I have tested Kernel versions 3.8.1-030801, 3.8.0-8, 3.7.10-030710, and 3.6.11-030611 today on raring (without using acpi_backlight=vendor) - and had the exact same results as when i did the test earlier in raring and quantal (see PDF file in attachment) - - The attachment contains the following files (all system generated files are from this install) + I have tested Kernel versions 3.8.1-030801, 3.8.0-8, 3.7.10-030710, and 3.6.11-030611 today on raring without acpi_backlight=vendor. I had the exact same results as when i did the test earlier in raring and quantal (see PDF file in attachment). The attachment contains the following files (all system generated files are from this install) Detailed test.pdf dmesg_3.6.11-030611-generic dmesg_3.7.10-030710-generic dmesg_3.8.0-8-generic dmesg_3.8.1-030801-generic lspci_very_verbose syslog - If any addition information is needed, just ask and specify the test - case (12.10/13.04, with/without acpi_backlight=vendor, and kernel - version) + WORKAROUND: One may choose a value from 0 (completely off) to 4882 (100%) works in increments of 2: + echo 100 | sudo tee /sys/class/backlight/intel_backlight/brightness ProblemType: Bug DistroRelease: Ubuntu 13.04 Package: linux-image-3.8.0-8-generic 3.8.0-8.17 ProcVersionSignature: Ubuntu 3.8.0-8.17-generic 3.8.0 Uname: Linux 3.8.0-8-generic x86_64 ApportVersion: 2.9-0ubuntu2 Architecture: amd64 AudioDevicesInUse: - USERPID ACCESS COMMAND - /dev/snd/controlC0: chad 1708 F xfce4-volumed - chad 1722 F pulseaudio - /dev/snd/pcmC0D0p: chad 1722 F...m pulseaudio + USERPID ACCESS COMMAND + /dev/snd/controlC0: chad 1708 F xfce4-volumed + chad 1722 F pulseaudio + /dev/snd/pcmC0D0p: chad 1722 F...m pulseaudio CurrentDmesg: - + Date: Fri Mar 1 11:31:52 2013 HibernationDevice: RESUME=UUID=a974f07b-dcae-4886-8ddb-e5a48219f891 InstallationDate: Installed on 2013-03-01 (0 days ago) InstallationMedia: Xubuntu 13.04 Raring Ringtail - Alpha amd64 (20130301) MachineType: ASUSTeK Computer Inc. K54C MarkForUpload: True ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-8-generic root=UUID=5c6a915b-d2e5-4746-9c09-657e51145ad6 ro quiet splash vt.handoff=7 RelatedPackageVersions: - linux-restricted-modules-3.8.0-8-generic N/A - linux-backports-modules-3.8.0-8-generic N/A - linux-firmware 1.103 + linux-restricted-modules-3.8.0-8-generic N/A + linux-backports-modules-3.8.0-8-generic N/A + linux-firmware 1.103 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/23/2012 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: K54C.210 dmi.board.asset.tag: ATN12345678901234567 dmi.board.name: K54C dmi.board.vendor: ASUSTeK Computer Inc. dmi.board.version: 1.0 dmi.chassis.asset.tag: ATN12345678901234567 dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK Computer Inc. dmi.chassis.version: 1.0 dmi.modalias:
[Bug 1138168] Re: Backlight control regression
I don't think the kernel is related, because I tested with kernel 3.5(it worked well with Ubuntu 12.10, with acpi_backlight=vendor) and had the same problem. I'm using 13.04 and Acer Aspire 4332. If I do sudo su and echo (brightness value) /sys/class/backlight/intel_backlight/brightness in the command line it works. The Fn ← → keys worked only if add acpi_osi=Linux to GRUB_CMDLINE_LINUX_DEFAULT. However I couldn't set bright from System Configuration. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1138168] Re: Backlight control regression
This is related to the kernel interracting with the bios that caters to windows 8 this issued shows up after a bios update i was able to get software to control the backlight properly on the 3.6.11 kernel, but not on anything newer than that see the upstream bug report for more info i never cared for using the fn brightness keys to control my brightness, i only use software to manage it -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1138168] Re: Backlight control regression
confirmed in 3.9.0-030900rc5-generic confirmed in 3.9.0-030900rc6-generic The kernel boot parameter acpi_osi=!Windows 2012 eliminates the regression example usage in /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT='quiet splash acpi_osi=!Windows 2012' -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1138168] Re: Backlight control regression
** Changed in: linux Status: Confirmed = Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1138168] Re: Backlight control regression
** Also affects: linux via http://bugzilla.kernel.org/show_bug.cgi?id=55161 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1138168] Re: Backlight control regression
** Changed in: linux Status: Unknown = Confirmed ** Changed in: linux Importance: Unknown = Medium -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1138168] Re: Backlight control regression
confirmed in 3.9.0-030900rc4-generic confirmed in 3.8.4-030804-generic confirmed in 3.8.0-14-generic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1138168] Re: Backlight control regression
Confirmed in 3.9.0-030900rc3-generic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1138168] Re: Backlight control regression
Confirmed in 3.8.3-030803-generic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1138168] Re: Backlight control regression
I made a recording of the issue, sorry my webcam sucks, i was not able to get vlc to flip the video playback from the webcam to compensate for the mirror, but its only purpose was showing the backlight response ** Attachment added: Recording of bug https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1138168/+attachment/3577086/+files/backlight-bug-linux-3.7_3.8_3.9.mp4 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1138168] Re: Backlight control regression
reported upstream (hopefully i did it right) https://bugzilla.kernel.org/show_bug.cgi?id=55161 ** Bug watch added: Linux Kernel Bug Tracker #55161 http://bugzilla.kernel.org/show_bug.cgi?id=55161 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1138168] Re: Backlight control regression
Confirmed in 3.9.0-030900rc2-generic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1138168] Re: Backlight control regression
Confirmed in 3.8.0-12-generic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1138168] Re: Backlight control regression
This issue appears to be an upstream bug, since you tested the latest upstream kernel. Would it be possible for you to open an upstream bug report[0]? That will allow the upstream Developers to examine the issue, and may provide a quicker resolution to the bug. Please follow the instructions on the wiki page[0]. The first step is to email the appropriate mailing list. If no response is received, then a bug may be opened on bugzilla.kernel.org. [0] https://wiki.ubuntu.com/Bugs/Upstream/kernel ** Changed in: linux (Ubuntu) Status: Confirmed = Triaged -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1138168] Re: Backlight control regression
ok i am confused where do i send the email to? should i attached the output of the command as files? can i use thunderbird to send it with it set to send in html and plain text? ** Attachment added: thunderbird send option https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1138168/+attachment/3564216/+files/Screenshot%20-%2003082013%20-%2003%3A19%3A18%20PM.png -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1138168] Re: Backlight control regression
Confirmed in 3.8.0-11-generic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1138168] Re: Backlight control regression
confirmed in 3.9.0-030900rc1-generic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1138168] Re: Backlight control regression
This test was done on 3.9.0-030900rc1-generic if it matters any value from 0 (completely off) to 4882 (100%) works for this, increments of 2 have a effect echo 100 | sudo tee /sys/class/backlight/intel_backlight/brightness it is like god mode for the back light level the lowest the fn+brightness keys allow is a level of 1000 in /sys/class/backlight/intel_backlight/brightness neither /sys/class/backlight/intel_backlight/brightness nor /sys/class/backlight/acpi_backlight/brightness change when using the brightness keys i think if the system could query the backlight without altering it, it would return to its working state like in 3.6.11 would be nice if the fn keys would synchronize with what the software sets the backlight to (never worked even on the old bios) as long as software like xbacklight and the xfce4-brightness-plugin can function properly that is good enough for me -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1138168] Re: Backlight control regression
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.8 kernel[0] (Not a kernel in the daily directory) and install both the linux-image and linux-image-extra .deb packages. If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'. If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'. If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'. Once testing of the upstream kernel is complete, please mark this bug as Confirmed. Thanks in advance. [0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.9-rc1-raring/ ** Changed in: linux (Ubuntu) Importance: Undecided = Medium ** Changed in: linux (Ubuntu) Status: Confirmed = Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1138168] Re: Backlight control regression
for the record it is not fixed in 3.8.2, probably should have mentioned that instead of filling your in boxes with emails for reference: http://ubuntuforums.org/showthread.php?t=2122160 sorry about the 2 for 1 email -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1138168] Re: Backlight control regression
RC1 is still missing 3 of the 4 debs, i don't think it would be possible till the other 3 are there i have tested this one, if that matters http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.8.2-raring/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1138168] Re: Backlight control regression
** Tags added: kernel-bug-exists-upstream -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1138168] Re: Backlight control regression
also effects 3.8.0.10 if that matters ** Changed in: linux (Ubuntu) Status: Incomplete = Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1138168 Title: Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
