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** Changed in: linux (Ubuntu)
       Status: New => Confirmed

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  Unable to control display brightness

Status in linux package in Ubuntu:

Bug description:

  I had hard rebooted my laptop after I found out that Ubuntu 18.04 was
  not responding to login credentials. But this reboot was not
  successful for some reason and I saw a few error messages. So I
  rebooted in recovery mode, and finally after recovery was done, I
  selected continue to normal boot. Since then, I'm not able to control
  the brightness of my screen. Please let me know what additional
  information or log files you would need to figure out the cause, and
  solve this problem for me.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: linux-image-4.15.0-66-generic 4.15.0-66.75
  ProcVersionSignature: Ubuntu 4.15.0-66.75-generic 4.15.18
  Uname: Linux 4.15.0-66-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.7
  Architecture: amd64
   /dev/snd/controlC1:  bane       5071 F.... pulseaudio
   /dev/snd/controlC0:  bane       5071 F.... pulseaudio
   country IN: DFS-UNSET
        (2402 - 2482 @ 40), (N/A, 20), (N/A)
        (5150 - 5350 @ 160), (N/A, 23), (N/A)
        (5725 - 5875 @ 80), (N/A, 23), (N/A)
  CurrentDesktop: ubuntu:GNOME
  Date: Thu Nov  7 18:31:57 2019
  HibernationDevice: RESUME=UUID=2db48228-3d47-4e07-a5a9-261e53c366b4
  InstallationDate: Installed on 2019-01-24 (286 days ago)
  InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 
  MachineType: Dell Inc. G3 3579
  ProcFB: 0 EFI VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-66-generic 
root=UUID=777c1fb9-e93b-42ef-9910-cee1f24a68d6 ro recovery nomodeset
   linux-restricted-modules-4.15.0-66-generic N/A
   linux-backports-modules-4.15.0-66-generic  N/A
   linux-firmware                             1.173.9
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install) 07/18/2018
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: 1.2.1 03TF0Y
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 10
  dmi.chassis.vendor: Dell Inc.
dmi:bvnDellInc.:bvr1.2.1:bd07/18/2018:svnDellInc.:pnG33579:pvr:rvnDellInc.:rn03TF0Y:rvrA00:cvnDellInc.:ct10:cvr: GSeries G3 3579
  dmi.sys.vendor: Dell Inc.

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