apport information ** Tags added: apport-collected bionic
** Description changed: 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 ** Attachment added: "AlsaInfo.txt" https://bugs.launchpad.net/bugs/1750513/+attachment/5140207/+files/AlsaInfo.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1750513 Title: Screen brightness control doesn't work To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1750513/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
