Neale Upstone, thank you for reporting this and helping make Ubuntu better.
Could you please test the latest upstream kernel available from the very top line at the top of the page from http://kernel.ubuntu.com/~kernel- ppa/mainline/?C=N;O=D (the release names are irrelevant for testing, and please do not test the daily folder)? Install instructions are available at https://wiki.ubuntu.com/Kernel/MainlineBuilds . This will allow additional upstream developers to examine the issue. If the latest kernel did not allow you to test to the issue (ex. you couldn't boot into the OS) please make a comment in your report about this, and continue to test the next most recent kernel version until you can test to the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this issue is fixed in the mainline kernel, please add the following tags by clicking on the yellow circle with a black pencil icon, next to the word Tags, located at the bottom of the report description: kernel-fixed-upstream kernel-fixed-upstream-X.Y-rcZ Where X, and Y are two numbers corresponding to the kernel version, and Z is one release candidate number if applicable. If the mainline kernel does not fix the issue, please add the following tags: kernel-bug-exists-upstream kernel-bug-exists-upstream-X.Y-rcZ Please note, an error to install the kernel does not fit the criteria of kernel-bug-exists-upstream. Once testing of the latest upstream kernel is complete, please mark this report's Status as Confirmed. Please let us know your results. Thank you for your understanding. ** Tags added: latest-bios-5fcn95ww ** 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 Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1516370 Title: Vendor backlight on Lenovo Z580 having random hotkeys issues Status in linux package in Ubuntu: Incomplete Bug description: I've taken a bold guess in the title of this bug. While investigating why on 14.04 LTS, I have working backlight on the latest 3.13 kernel, but not on the 3.16, I tried acpi_backlight=vendor. With default boot parameters, I just get /sys/class/backlight/intel_backlight/, and the backlight works correctly on 3.13, but does not change the brightness on 3.16 (the OSD does show that the hotkeys are trying to change the brightness). With acpi_backlight=vendor, I get both intel and /lenovo/. The key point for this bug report is what happens with the lenovo one: The hotkeys work and make the backlight change, but not consistently. Repeatedly using the hotkey to increase the brightness causes the level to increase, but then occasionally reset to zero (including resetting as shown in the OSD - i.e. the OSD is always showing the level that the backlight actually is). Occasionally the OSD shows the "enable touchpad" icon when pressing the increase brightness hotkey repeatedly. The same action also causes the wifi to enable/disable randomly. If I press the hotkey with pauses in between, things behave normally. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-67-generic 3.13.0-67.110 ProcVersionSignature: Ubuntu 3.13.0-67.110-generic 3.13.11-ckt27 Uname: Linux 3.13.0-67-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.14.1-0ubuntu3.18 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: neale 3106 F.... pulseaudio CurrentDesktop: Unity Date: Sun Nov 15 11:16:55 2015 HibernationDevice: RESUME=UUID=1fd50851-1727-4432-a99c-d0be8aafc983 InstallationDate: Installed on 2013-10-23 (752 days ago) InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) MachineType: LENOVO IdeaPad Z580 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-67-generic root=UUID=d66417de-a540-485b-b469-aabd51a8844b ro quiet splash acpi_backlight=vendor RelatedPackageVersions: linux-restricted-modules-3.13.0-67-generic N/A linux-backports-modules-3.13.0-67-generic N/A linux-firmware 1.127.18 SourcePackage: linux StagingDrivers: rts5139 UpgradeStatus: Upgraded to trusty on 2014-03-17 (607 days ago) dmi.bios.date: 12/25/2012 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: 5FCN95WW dmi.board.asset.tag: No Asset Tag dmi.board.name: Lenovo dmi.board.vendor: LENOVO dmi.board.version: 31900003WIN8 STD MLT dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: Lenovo Z580 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr5FCN95WW:bd12/25/2012:svnLENOVO:pnIdeaPadZ580:pvrLenovoZ580:rvnLENOVO:rnLenovo:rvr31900003WIN8STDMLT:cvnLENOVO:ct10:cvrLenovoZ580: dmi.product.name: IdeaPad Z580 dmi.product.version: Lenovo Z580 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1516370/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
