apport information ** Attachment added: "IwConfig.txt" https://bugs.launchpad.net/bugs/1750513/+attachment/5140210/+files/IwConfig.txt
-- 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/1750513 Title: Screen brightness control doesn't work Status in linux package in Ubuntu: Confirmed Bug description: On 4.13 kernels I cannot change brightness of my display. Other users of the same laptop model also have the issue. Using kernel 4.10 the problem doesn't happen and brightness can be changed using hardware buttons(fn+f5, fn+f6). On 4.13 I cannot find any settings that would allow me to change brightness. On 4.13 linux always starts with really dimmed screen which makes the computer hard to use in any kind of daylight, even indoors. lsb_release -rd: Description: Ubuntu 16.04.3 LTS Release: 16.04 uname -a: Linux redacted-ThinkPad-P51 4.13.0-32-generic #35~16.04.1-Ubuntu SMP Thu Jan 25 10:13:43 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux (also happens in any earlier version of 4.13, I need to revert up to 4.10 in order for it to work) Hardware: Lenovo ThinkPad P51 15.6" ProblemType: Bug DistroRelease: Ubuntu 16.04 Package: linux-image-4.13.0-32-generic 4.13.0-32.35~16.04.1 ProcVersionSignature: Ubuntu 4.13.0-32.35~16.04.1-generic 4.13.13 Uname: Linux 4.13.0-32-generic x86_64 ApportVersion: 2.20.1-0ubuntu2.15 Architecture: amd64 CurrentDesktop: Unity Date: Tue Feb 20 09:00:09 2018 InstallationDate: Installed on 2017-10-03 (139 days ago) InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801) SourcePackage: linux-hwe UpgradeStatus: No upgrade log present (probably fresh install) --- ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: lchr 2877 F.... pulseaudio /dev/snd/controlC1: lchr 2877 F.... pulseaudio CurrentDesktop: ubuntu:GNOME DistroRelease: Ubuntu 18.04 InstallationDate: Installed on 2018-04-04 (41 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105.1) MachineType: LENOVO 20HJS1NW00 NonfreeKernelModules: nvidia_modeset nvidia Package: linux (not installed) ProcEnviron: TERM=xterm-256color PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=pl_PL.UTF-8 SHELL=/bin/bash ProcFB: 0 EFI VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-20-generic root=UUID=3afbbc52-6d66-4597-a1f2-6254d9f44643 ro quiet splash vt.handoff=1 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 RelatedPackageVersions: linux-restricted-modules-4.15.0-20-generic N/A linux-backports-modules-4.15.0-20-generic N/A linux-firmware 1.173 Tags: bionic Uname: Linux 4.15.0-20-generic x86_64 UpgradeStatus: Upgraded to bionic on 2018-05-11 (5 days ago) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 07/24/2017 dmi.bios.vendor: LENOVO dmi.bios.version: N1UET37W (1.11 ) dmi.board.asset.tag: Not Available dmi.board.name: 20HJS1NW00 dmi.board.vendor: LENOVO dmi.board.version: SDK0J40697 WIN dmi.chassis.asset.tag: No Asset Information dmi.chassis.type: 10 dmi.chassis.vendor: LENOVO dmi.chassis.version: None dmi.modalias: dmi:bvnLENOVO:bvrN1UET37W(1.11):bd07/24/2017:svnLENOVO:pn20HJS1NW00:pvrThinkPadP51:rvnLENOVO:rn20HJS1NW00:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone: dmi.product.family: ThinkPad P51 dmi.product.name: 20HJS1NW00 dmi.product.version: ThinkPad P51 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1750513/+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
