← Back to team overview

kernel-packages team mailing list archive

[Bug 1522139] Re: Unable to adjust brightness


Mark Reeves, it's not imperative you test this week, as this would be at
your convenience.

However, when you do have time, you would have options:
1) Install Ubuntu to a different partition and then test this there.
2) Backup, or clone the primary install.

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

  Unable to adjust brightness

Status in linux package in Ubuntu:

Bug description:
  I have an Intel NUC that's otherwise running Ubuntu 15.10 great! It's
  hooked up to a ViewSonic monitor via mini-DV / DVI.

  The brightness controls are disabled on the monitor.

  xbacklight does nothing. And I don't have the Brightness slider in
  Brightness & Lock.

  I've been poking around, and have seen where to create a file in
  xorg.conf.d. The problem is, I have an empty /sys/class/backlight dir.

  Per the following, I'm submitting a support ticket:


  I'd like to be able to increase the brightness on my screen.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: linux-image-4.2.0-19-generic 4.2.0-19.23
  ProcVersionSignature: Ubuntu 4.2.0-19.23-generic 4.2.6
  Uname: Linux 4.2.0-19-generic x86_64
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
   /dev/snd/controlC1:  mark       2213 F.... pulseaudio
   /dev/snd/controlC0:  mark       2213 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed Dec  2 15:24:39 2015
  HibernationDevice: RESUME=UUID=475f89b0-71dc-465f-997e-e88d611d948d
  InstallationDate: Installed on 2015-11-24 (7 days ago)
  InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.2.0-19-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
   linux-restricted-modules-4.2.0-19-generic N/A
   linux-backports-modules-4.2.0-19-generic  N/A
   linux-firmware                            1.149.2
  SourcePackage: linux
  UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/12/2015
  dmi.bios.vendor: Intel Corporation
  dmi.bios.version: RYBDWi35.86A.0350.2015.0812.1722
  dmi.board.name: NUC5i5RYB
  dmi.board.vendor: Intel Corporation
  dmi.board.version: H40999-504
  dmi.chassis.type: 3
  dmi.modalias: dmi:bvnIntelCorporation:bvrRYBDWi35.86A.0350.2015.0812.1722:bd08/12/2015:svn:pn:pvr:rvnIntelCorporation:rnNUC5i5RYB:rvrH40999-504:cvn:ct3:cvr:

To manage notifications about this bug go to: