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[Bug 1522139] Re: Unable to adjust brightness


Thanks for the quick reply! I'm not technically disinclined to take
these steps to further troubleshoot the issue, but am wary of
undertaking steps this week that may result in being unable to "boot
into the OS". Is this the only way to verify a fix? This is a primary
development machine and a busy week here.


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  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:

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