packard bell bg 46 brightness buttons work improperly

[Dmitriy Geels]

Binary package hint: gnome-power-manager

Sorry, I couldn't add g-p-m to the list of affected packages in previous bug #350912 (looks like launchpad bug), so I marking previous report as dupe of this.

See Bug #350912 for details.

I'm sure now, that problematic place is power-manager, because kernel brightness interface works flawlessly, and even on gpm logon screen "brightness up" key works as expected (but brightness down do nothing).

ProblemType: Bug
ACAdapter: Present
Architecture: amd64
Battery: Present
CPUScaling: Present
DistroRelease: Ubuntu 9.04
LaptopPanel: Present
Package: gnome-power-manager 2.24.2-2ubuntu7
ProcEnviron:
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
SourcePackage: gnome-power-manager
Uname: Linux 2.6.28-11-generic x86_64

[Dmitriy Geels (dmig)]

Got g-p-m debug log, 23:00:20-23:00:40 -- brightness up button pressed several times. Then after 23:00:40 -- brightness down several times, after 23:01 -- eco button several times.

[Scott Howard (showard314)]

Thanks for your report. How did you determine that ACPI was involved in this bug?

Also, something else to check out is bug #376924, specifically a link to a potential patch at: http://marc.info/?l=linux-acpi&m=124456088526538&w=2. If you are able, try that patch in acpi and report if it helps.

[Dmitriy Geels (dmig)]

Scott, thanks for your message! This bug seems to be duplicate of bug #376924.
ACPI is the first thing I thought about, but it isn't ACPI problem actually, it's g-p-m bug. Even gnome brightness applet changes brightness as expected (but causing high CPU load for few seconds).