kernel-packages team mailing list archive

[John D Marsden <1338063@xxxxxxxxxxxxxxxxxx>]

Clarification:

Screen does not always come up dimmed after suspend.  Screen comes up
with setting prior to suspend.

If the computer has gone into suspend itself after being unused for a
certain amount of time it comes up dimmed, even if not deliberately set
to this by the user.  In these circumstances the computer has dimmed the
screen some time prior to going into suspend.

In all cases controls no longer function after suspend as reported in
initial post.

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https://bugs.launchpad.net/bugs/1338063

Title:
  Brightness control lost after suspend screen dimmed

Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Using Ubuntu 14.04.  Recently updated to kernel version Ubuntu
  3.13.0-30.54-generic 3.13.11.2

  I expect brightness of my LCD screen to remain the same and be
  controllable after waking from suspend.  It doesn't and isn't.

  This seems to have only started recently - presumably after a recent
  update.

  What happens:

  Brightness controls fully working after initial boot, both through
  function keys and system settings.

  After putting computer into suspend and then re-awakening the LCD
  screen comes up with lowest brightness in actual appearance but
  settings still show the brightness as set at suspend time.  Controls
  for brightness have become ineffective - they slide the brightness bar
  along but make no difference to the actual brightness of the screen.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-30-generic 3.13.0-30.54
  ProcVersionSignature: Ubuntu 3.13.0-30.54-generic 3.13.11.2
  Uname: Linux 3.13.0-30-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  john       2060 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sat Jul  5 18:55:05 2014
  InstallationDate: Installed on 2012-06-04 (760 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
  MachineType: TOSHIBA PORTEGE Z835
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-30-generic root=UUID=865f4d37-5ceb-4e4a-b59b-032fa8a2c80b ro quiet splash elevator=noop vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-30-generic N/A
   linux-backports-modules-3.13.0-30-generic  N/A
   linux-firmware                             1.127.4
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-04-27 (68 days ago)
  dmi.bios.date: 02/08/2012
  dmi.bios.vendor: TOSHIBA
  dmi.bios.version: Version 1.60
  dmi.board.asset.tag: 0000000000
  dmi.board.name: Portable PC
  dmi.board.vendor: TOSHIBA
  dmi.board.version: Version A0
  dmi.chassis.asset.tag: 0000000000
  dmi.chassis.type: 10
  dmi.chassis.vendor: TOSHIBA
  dmi.chassis.version: Version 1.0
  dmi.modalias: dmi:bvnTOSHIBA:bvrVersion1.60:bd02/08/2012:svnTOSHIBA:pnPORTEGEZ835:pvrPT224U-01W00C:rvnTOSHIBA:rnPortablePC:rvrVersionA0:cvnTOSHIBA:ct10:cvrVersion1.0:
  dmi.product.name: PORTEGE Z835
  dmi.product.version: PT224U-01W00C
  dmi.sys.vendor: TOSHIBA

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