kernel-packages team mailing list archive

[Eli Fox-Epstein <eli@xxxxxxxxxxxx>]

Public bug reported:

Running 14.04, just upgraded. I can no longer adjust my backlight on my
ThinkPad T530. I am attaching a number of files as requested in
https://wiki.ubuntu.com/Kernel/Debugging/Backlight. See also:
http://askubuntu.com/questions/473660/brightness-keys-no-longer-work

Note that /sys/class/backlight is empty unless acpi_backlight=vendor is
set.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-27-generic 3.13.0-27.50
ProcVersionSignature: Ubuntu 3.13.0-27.50-generic 3.13.11
Uname: Linux 3.13.0-27-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  eli        3150 F.... pulseaudio
CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied
Date: Thu May 29 08:43:12 2014
InstallationDate: Installed on 2012-11-02 (572 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MachineType: LENOVO 2359CTO
ProcFB:
 
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-27-generic root=UUID=4666fbf8-118b-4336-bc4b-54c0e7dfd118 ro nosplash nomodeset video.use_native_backlight=1
RfKill:
 0: phy0: Wireless LAN
 	Soft blocked: no
 	Hard blocked: no
SourcePackage: linux
UpgradeStatus: Upgraded to trusty on 2014-05-25 (3 days ago)
WifiSyslog:
 
dmi.bios.date: 09/13/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: G4ET62WW (2.04 )
dmi.board.asset.tag: Not Available
dmi.board.name: 2359CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrG4ET62WW(2.04):bd09/13/2012:svnLENOVO:pn2359CTO:pvrThinkPadT530:rvnLENOVO:rn2359CTO:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2359CTO
dmi.product.version: ThinkPad T530
dmi.sys.vendor: LENOVO

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


** Tags: amd64 apport-bug trusty

** Attachment added: "A tar of the files requested from the Backlight wiki page"
   https://bugs.launchpad.net/bugs/1324529/+attachment/4122233/+files/report.tar

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https://bugs.launchpad.net/bugs/1324529

Title:
  Backlight not adjustable

Status in “linux” package in Ubuntu:
  New

Bug description:
  Running 14.04, just upgraded. I can no longer adjust my backlight on
  my ThinkPad T530. I am attaching a number of files as requested in
  https://wiki.ubuntu.com/Kernel/Debugging/Backlight. See also:
  http://askubuntu.com/questions/473660/brightness-keys-no-longer-work

  Note that /sys/class/backlight is empty unless acpi_backlight=vendor
  is set.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-27-generic 3.13.0-27.50
  ProcVersionSignature: Ubuntu 3.13.0-27.50-generic 3.13.11
  Uname: Linux 3.13.0-27-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  eli        3150 F.... pulseaudio
  CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied
  Date: Thu May 29 08:43:12 2014
  InstallationDate: Installed on 2012-11-02 (572 days ago)
  InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
  MachineType: LENOVO 2359CTO
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-27-generic root=UUID=4666fbf8-118b-4336-bc4b-54c0e7dfd118 ro nosplash nomodeset video.use_native_backlight=1
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-05-25 (3 days ago)
  WifiSyslog:
   
  dmi.bios.date: 09/13/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: G4ET62WW (2.04 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 2359CTO
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Defined
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: dmi:bvnLENOVO:bvrG4ET62WW(2.04):bd09/13/2012:svnLENOVO:pn2359CTO:pvrThinkPadT530:rvnLENOVO:rn2359CTO:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2359CTO
  dmi.product.version: ThinkPad T530
  dmi.sys.vendor: LENOVO

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