[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Tags added: bios-outdated-1301 ** Changed in: linux (Ubuntu) Importance: Medium = Low ** Summary changed: - Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM + [ASUS Eeepc 1015PEM] Screen brightness cannot be adjusted ** Tags added: needs-reverse-bisect -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: [ASUS Eeepc 1015PEM] Screen brightness cannot be adjusted To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted
Also be sure to try the steps at: https://wiki.ubuntu.com/Kernel/Debugging/Backlight . -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Summary changed: - Screen brightness cannot be adjusted + Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Attachment added: acpidump.txt https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+attachment/4095599/+files/acpidump.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
Backlight debugging as per link supplied by jpds. Backlight control does not work, but there are entries in /sys/class/backlight. Debugging information collected and attached. Testing for work around: After reboot with only the kernel parameter acpi_backlight=vendor: The function keys (hotkeys) have no effect (i.e do not change brightness or cause the brightness indicator to appear) but the Brightness slider in the Brightness Lock settings dialogue does change the screen brightness. Command ls /sys/class/backlight vendorbacklight was executed There is a folder /sys/class/backlight/intel_backlight/ Command ls -la /sys/class/backlight/intel_backlight/ lslabacklight was executed Command echo 8 /sys/class/backlight/intel_backlight/brightness executed causing the screen brightnes to change to very dim. After reboot with only the kernel parameter video.use_bios_initial_backlight=0 : The function keys (hotkeys) do not change brightness but they do cause the brightness indicator to appear and move. The Brightness slider in the Brightness Lock settings dialogue *does* change the screen brightness. Kernel is 3.13.0-24-generic. After reboot with only the kernel parameter video.use_native_backlight=1 : The function keys (hotkeys) do not change brightness but they do cause the brightness indicator to appear and move. The Brightness slider in the Brightness Lock settings dialogue does not change the screen brightness. ** Attachment added: acpi https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+attachment/4095598/+files/acpi -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Attachment added: dmidecode.log https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+attachment/4095601/+files/dmidecode.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Attachment added: backlight https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+attachment/4095600/+files/backlight -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Attachment added: results.log https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+attachment/4095606/+files/results.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Attachment added: ssdt2.dat https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+attachment/4095610/+files/ssdt2.dat -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Attachment added: fwts_method https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+attachment/4095605/+files/fwts_method -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Attachment added: ssdt4.dat https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+attachment/4095616/+files/ssdt4.dat -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Attachment added: ssdt6.dat https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+attachment/4095642/+files/ssdt6.dat -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Attachment added: dsdt.dsl https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+attachment/4095603/+files/dsdt.dsl -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Attachment added: ssdt5.dat https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+attachment/4095617/+files/ssdt5.dat -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Attachment added: version https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+attachment/4095646/+files/version -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Attachment added: ssdt7.dat https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+attachment/4095643/+files/ssdt7.dat -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Attachment added: ssdt1.dat https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+attachment/4095609/+files/ssdt1.dat -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Attachment added: ssdt8.dat https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+attachment/4095644/+files/ssdt8.dat -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Attachment added: fwts https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+attachment/4095604/+files/fwts -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Attachment added: dsdt.dat https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+attachment/4095602/+files/dsdt.dat -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Attachment added: ssdt3.dat https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+attachment/4095615/+files/ssdt3.dat -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Attachment added: lslabacklight https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+attachment/4095652/+files/lslabacklight ** Description changed: This is a regression. Up to 13.10 there was no problem changing screen - bightness on my Asus Eeepc 1015PEM. This machine has function keys for + brightness on my Asus Eeepc 1015PEM. This machine has function keys for changing the screen brightness up (with Fn+F6) and down (with Fn+F5). In 14.04 using the function keys causes the indicator to appear and the the brightness bar moves appropriately, but there is no change to screen brightness. Using the slider on the (new?) Brightness and Lock settings form also has no affect on the screen brightness. Operation of the function keys will move the slider. However, repeated use of the function keys causes the slider control to disappear from the form (as is found on a machine where control of screen brightness by function keys are not available). 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 i686 NonfreeKernelModules: wl ApportVersion: 2.14.1-0ubuntu3 Architecture: i386 AudioDevicesInUse: - USERPID ACCESS COMMAND - /dev/snd/controlC0: tony 2031 F pulseaudio + USERPID ACCESS COMMAND + /dev/snd/controlC0: tony 2031 F pulseaudio CurrentDesktop: Unity Date: Tue Apr 22 20:12:48 2014 HibernationDevice: RESUME=UUID=fcc3dc2b-0a3b-4dcf-98d9-b1f03b2c812e InstallationDate: Installed on 2012-04-27 (724 days ago) InstallationMedia: Ubuntu 12.04 LTS Precise Pangolin - Release i386 (20120423) MachineType: ASUSTeK Computer INC. 1015PEM ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=abf837ae-032d-4686-8803-27a1376ee9c5 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 + 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: Upgraded to trusty on 2014-04-20 (2 days ago) dmi.bios.date: 10/06/2010 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 0801 dmi.board.asset.tag: To Be Filled By O.E.M. dmi.board.name: 1015PE dmi.board.vendor: ASUSTeK Computer INC. dmi.board.version: x.xx dmi.chassis.asset.tag: 0x dmi.chassis.type: 10 dmi.chassis.vendor: ASUSTeK Computer INC. dmi.chassis.version: x.x dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr0801:bd10/06/2010:svnASUSTeKComputerINC.:pn1015PEM:pvrx.x:rvnASUSTeKComputerINC.:rn1015PE:rvrx.xx:cvnASUSTeKComputerINC.:ct10:cvrx.x: dmi.product.name: 1015PEM dmi.product.version: x.x dmi.sys.vendor: ASUSTeK Computer INC. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Attachment added: vendorbacklight https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+attachment/4095651/+files/vendorbacklight -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Attachment added: ssdt9.dat https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+attachment/4095645/+files/ssdt9.dat -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
** Attachment added: video https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+attachment/4095650/+files/video -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM
Tested with mainline kernel (linux-image-3.15.0-031500rc2-generic) - Both hotkeys and the Brightness slider in the Brightness Lock settings dialogue change the screen brightness correctly. ** Tags added: kernel-fixed-upstream ** 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/1311297 Title: Screen brightness cannot be adjusted on ASUS Eeepc 1015PEM To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1311297] Re: Screen brightness cannot be adjusted
Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.15 kernel[0]. 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/v3.15-rc2-trusty/ ** 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/1311297 Title: Screen brightness cannot be adjusted To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1311297/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs