Public bug reported:
Binary package hint: acpi
The brightness keys seem to work fine on a cold start - but after
hibernating or suspending, or even switching from AC to battery, the
brightness keys don't work properly.
Intended effect:
Brightness-Up and -Down keys increment monitor brightness by equal amounts (to
a maximum of 15)
Actual effect:
Brightness is incremented by seemingly random amounts, and on occasion,
brightness will randomly jump to an arbitrary value.
Notes:
Writing to /sys/devices/virtual/backlight/acpi_video0/brightness works fine.
Just the hotkeys are malfunctioning.
ProblemType: Bug
Architecture: amd64
Date: Thu Feb 18 22:06:33 2010
DistroRelease: Ubuntu 9.10
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
NonfreeKernelModules: wl nvidia
Package: acpi (not installed)
ProcEnviron:
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-19.56-generic
SourcePackage: acpi
Uname: Linux 2.6.31-19-generic x86_64
** Affects: acpi (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug
--
[DellStudioXPS1340] Brightness Fn keys do not work properly
https://bugs.launchpad.net/bugs/524214
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