kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

Alan Pater, let us put the full computer model aside for now. Hence, the
issue you are reporting is an upstream one. Could you please report this
problem to the linux-acpi mailing list (not bugzilla) by following the
instructions _verbatim_ at https://wiki.ubuntu.com/Bugs/Upstream/kernel
?

Please provide a direct URL to your e-mail to the mailing list once you
have made it so that it may be tracked.

Thank you for your understanding.

** Tags added: kernel-bug-exists-upstream-3.18-rc1

** Changed in: linux (Ubuntu)
       Status: Incomplete => Triaged

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https://bugs.launchpad.net/bugs/1385453

Title:
  Toshiba R700 backlight control not always working

Status in The Linux Kernel:
  Unknown
Status in “linux” package in Ubuntu:
  Triaged

Bug description:
  When returning from sleep mode, I lose backlight control via Fn-F7.

  Restarting the system restores control.

  I am running Ubuntu 14.04 64 bit.
  ~$ uname -psrv
  Linux 3.13.0-37-generic #64-Ubuntu SMP Mon Sep 22 21:28:38 UTC 2014 x86_64

  I could also adjust the brightness from the terminal:

  ~$ cat /sys/class/backlight/intel_backlight/brightness
  1030

  ~$ grep . /sys/class/backlight/intel_backlight/*
  /sys/class/backlight/intel_backlight/actual_brightness:1030
  /sys/class/backlight/intel_backlight/bl_power:0
  /sys/class/backlight/intel_backlight/brightness:1030
  /sys/class/backlight/intel_backlight/max_brightness:4539

  So, to temporarily increase the screen brightness:

  ~$ echo 3030 | sudo tee /sys/class/backlight/intel_backlight/brightness
  3030

  But that does not give back control via Fn-F7, it just gives an
  independent way of adjusting the backlight.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-37-generic 3.13.0-37.64
  ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7
  Uname: Linux 3.13.0-37-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  asp        2789 F.... pulseaudio
  CRDA:
   country PE:
   	(2402 - 2482 @ 40), (N/A, 20)
   	(5735 - 5835 @ 40), (N/A, 30)
  CurrentDesktop: Unity
  Date: Fri Oct 24 13:56:26 2014
  HibernationDevice: RESUME=UUID=7d358de7-c06d-487c-959d-6d6f94292a9c
  InstallationDate: Installed on 2014-03-08 (229 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140304)
  MachineType: TOSHIBA PORTEGE R700
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-37-generic root=UUID=82477238-1cd0-4280-b615-9e54c4178914 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-37-generic N/A
   linux-backports-modules-3.13.0-37-generic  N/A
   linux-firmware                             1.127.7
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/22/2011
  dmi.bios.vendor: TOSHIBA
  dmi.bios.version: Version 2.20
  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:bvrVersion2.20:bd12/22/2011:svnTOSHIBA:pnPORTEGER700:pvrPT311Q-02S02U:rvnTOSHIBA:rnPortablePC:rvrVersionA0:cvnTOSHIBA:ct10:cvrVersion1.0:
  dmi.product.name: PORTEGE R700
  dmi.product.version: PT311Q-02S02U
  dmi.sys.vendor: TOSHIBA

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