** 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: - USER PID ACCESS COMMAND - /dev/snd/controlC0: chad 1708 F.... xfce4-volumed - chad 1722 F.... pulseaudio - /dev/snd/pcmC0D0p: chad 1722 F...m pulseaudio + USER PID 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: dmi:bvnAmericanMegatrendsInc.:bvrK54C.210:bd10/23/2012:svnASUSTeKComputerInc.:pnK54C:pvr1.0:rvnASUSTeKComputerInc.:rnK54C:rvr1.0:cvnASUSTeKComputerInc.:ct10:cvr1.0: dmi.product.name: K54C dmi.product.version: 1.0 dmi.sys.vendor: ASUSTeK Computer Inc. ** Summary changed: - Backlight control regression + 8086:0106 Backlight control regression -- 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: 8086:0106 Backlight control regression To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1138168/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
