[Bug 832483] [NEW] Toshiba R835-P56X - screen brightness control does not work after suspend/resume

[Luke Scharf]

Public bug reported:

Toshiba R835-P56X - screen brightness control does not work after
suspend/resume.  It works just fine before suspend/resume.  After
suspend/resume, the dbus (or whatever) indicator shows the brightness
slider-bar changing, but the screen brightness doesn't actually change.

Restarting acpid or acpi-support doesn't make any difference.  Only
workaround that I've found so far is to reboot the machine.

I'll be happy to perform any tests that you all can suggest, as well as
provide more/deeper debugging information.  I've been a Linux
user/sysadmin since 1998, and I'm proficient in programming/development
-- but I'm mostly unfamiliar with the acpi and Linux's implementation of
it.

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: acpi-support 0.138
Uname: Linux 2.6.39-02063904-generic x86_64
Architecture: amd64
Date: Tue Aug 23 22:12:11 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
ProcEnviron:
 LANGUAGE=en_US:en
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: acpi-support
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: acpi-support (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug natty

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https://bugs.launchpad.net/bugs/832483

Title:
  Toshiba R835-P56X - screen brightness control does not work after
  suspend/resume

Status in “acpi-support” package in Ubuntu:
  New

Bug description:
  Toshiba R835-P56X - screen brightness control does not work after
  suspend/resume.  It works just fine before suspend/resume.  After
  suspend/resume, the dbus (or whatever) indicator shows the brightness
  slider-bar changing, but the screen brightness doesn't actually
  change.

  Restarting acpid or acpi-support doesn't make any difference.  Only
  workaround that I've found so far is to reboot the machine.

  I'll be happy to perform any tests that you all can suggest, as well
  as provide more/deeper debugging information.  I've been a Linux
  user/sysadmin since 1998, and I'm proficient in
  programming/development -- but I'm mostly unfamiliar with the acpi and
  Linux's implementation of it.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: acpi-support 0.138
  Uname: Linux 2.6.39-02063904-generic x86_64
  Architecture: amd64
  Date: Tue Aug 23 22:12:11 2011
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  ProcEnviron:
   LANGUAGE=en_US:en
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: acpi-support
  UpgradeStatus: No upgrade log present (probably fresh install)

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