apport information

** Attachment added: "Lspci.txt"

You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.

  Screen brightness control doesn't work

Status in linux package in Ubuntu:

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)

  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 
  SourcePackage: linux-hwe
  UpgradeStatus: No upgrade log present (probably fresh install)
  ApportVersion: 2.20.9-0ubuntu7
  Architecture: amd64
   /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)
   PATH=(custom, no user)
  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
   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 07/24/2017
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N1UET37W (1.11 )
  dmi.board.asset.tag: Not Available 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:bvnLENOVO:bvrN1UET37W(1.11):bd07/24/2017:svnLENOVO:pn20HJS1NW00:pvrThinkPadP51:rvnLENOVO:rn20HJS1NW00:rvrSDK0J40697WIN:cvnLENOVO:ct10:cvrNone: ThinkPad P51 20HJS1NW00
  dmi.product.version: ThinkPad P51
  dmi.sys.vendor: LENOVO

To manage notifications about this bug go to:

Mailing list:
Post to     :
Unsubscribe :
More help   :

Reply via email to