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[Bug 1317979] [NEW] backlight stops working after suspend

 

Public bug reported:

Add debug information from kernel debug inform from
https://wiki.ubuntu.com/Kernel/Debugging/Backlight

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-24-generic 3.13.0-24.47
ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  traxtopel   3077 F.... pulseaudio
 /dev/snd/controlC1:  traxtopel   3077 F.... pulseaudio
CurrentDesktop: Unity
Date: Fri May  9 18:29:41 2014
HibernationDevice: RESUME=UUID=de5a6c32-5d89-4cb3-aee1-a8b32c416a1d
InstallationDate: Installed on 2014-04-04 (35 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MachineType: System76, Inc. Sable Complete
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=27287be2-654a-4c7a-9c5b-cc37df0adc0a ro quiet splash acpi_backlight=vendor vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-24-generic N/A
 linux-backports-modules-3.13.0-24-generic  N/A
 linux-firmware                             1.127
SourcePackage: linux
StagingDrivers: keucr
UpgradeStatus: Upgraded to trusty on 2014-04-18 (21 days ago)
dmi.bios.date: 10/09/2013
dmi.bios.vendor: Intel Corp.
dmi.bios.version: AGH6120H.86A.0023.2013.1009.1142
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: DH61AGL
dmi.board.vendor: Intel Corporation
dmi.board.version: G71256-202
dmi.chassis.type: 3
dmi.chassis.vendor: System76, Inc.
dmi.chassis.version: sabc1
dmi.modalias: dmi:bvnIntelCorp.:bvrAGH6120H.86A.0023.2013.1009.1142:bd10/09/2013:svnSystem76,Inc.:pnSableComplete:pvrsabc1:rvnIntelCorporation:rnDH61AGL:rvrG71256-202:cvnSystem76,Inc.:ct3:cvrsabc1:
dmi.product.name: Sable Complete
dmi.product.version: sabc1
dmi.sys.vendor: System76, Inc.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug staging trusty

** Attachment added: "kernel debug inform from https://wiki.ubuntu.com/Kernel/Debugging/Backlight";
   https://bugs.launchpad.net/bugs/1317979/+attachment/4108773/+files/debug.zip

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https://bugs.launchpad.net/bugs/1317979

Title:
   backlight stops working after suspend

Status in “linux” package in Ubuntu:
  New

Bug description:
  Add debug information from kernel debug inform from
  https://wiki.ubuntu.com/Kernel/Debugging/Backlight

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-24-generic 3.13.0-24.47
  ProcVersionSignature: Ubuntu 3.13.0-24.47-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  traxtopel   3077 F.... pulseaudio
   /dev/snd/controlC1:  traxtopel   3077 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Fri May  9 18:29:41 2014
  HibernationDevice: RESUME=UUID=de5a6c32-5d89-4cb3-aee1-a8b32c416a1d
  InstallationDate: Installed on 2014-04-04 (35 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  MachineType: System76, Inc. Sable Complete
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=27287be2-654a-4c7a-9c5b-cc37df0adc0a ro quiet splash acpi_backlight=vendor vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-24-generic N/A
   linux-backports-modules-3.13.0-24-generic  N/A
   linux-firmware                             1.127
  SourcePackage: linux
  StagingDrivers: keucr
  UpgradeStatus: Upgraded to trusty on 2014-04-18 (21 days ago)
  dmi.bios.date: 10/09/2013
  dmi.bios.vendor: Intel Corp.
  dmi.bios.version: AGH6120H.86A.0023.2013.1009.1142
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: DH61AGL
  dmi.board.vendor: Intel Corporation
  dmi.board.version: G71256-202
  dmi.chassis.type: 3
  dmi.chassis.vendor: System76, Inc.
  dmi.chassis.version: sabc1
  dmi.modalias: dmi:bvnIntelCorp.:bvrAGH6120H.86A.0023.2013.1009.1142:bd10/09/2013:svnSystem76,Inc.:pnSableComplete:pvrsabc1:rvnIntelCorporation:rnDH61AGL:rvrG71256-202:cvnSystem76,Inc.:ct3:cvrsabc1:
  dmi.product.name: Sable Complete
  dmi.product.version: sabc1
  dmi.sys.vendor: System76, Inc.

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