Bug 8314 - Suspend-to-mem on MacBook destroys backlight control
Summary: Suspend-to-mem on MacBook destroys backlight control
Alias: None
Product: ACPI
Classification: Unclassified
Component: Power-Sleep-Wake (show other bugs)
Hardware: i386 Linux
: P2 normal
Assignee: Rafael J. Wysocki
Depends on:
Blocks: 7216
  Show dependency tree
Reported: 2007-04-08 20:56 UTC by Mike Harris
Modified: 2007-08-08 10:20 UTC (History)
2 users (show)

See Also:
Kernel Version: 2.6.21-rc6
Regression: ---
Bisected commit-id:

Kernel config (42.19 KB, text/plain)
2007-04-08 20:57 UTC, Mike Harris
Output of dmesg (30.31 KB, text/x-log)
2007-04-08 20:58 UTC, Mike Harris

Description Mike Harris 2007-04-08 20:56:32 UTC
Distribution: Fedora Core 6
Hardware Environment: MacBook Core Duo
Problem Description:
After resuming from a suspend-to-mem (echo "mem" > /sys/power/state), the 
backlight is set at maximum brightness.
When pbbuttonsd is running before the suspend, the backlight control no longer 
works after resume.
When pbbuttonsd is not running before the suspend, but started after a resume, 
it claims no backlight driver is available and backlight control does not 
work. This does not happen when pbbuttonsd is started on a "fresh" machine.
Comment 1 Mike Harris 2007-04-08 20:57:20 UTC
Created attachment 11108 [details]
Kernel config
Comment 2 Mike Harris 2007-04-08 20:58:47 UTC
Created attachment 11109 [details]
Output of dmesg
Comment 3 Adrian Bunk 2007-04-13 16:51:54 UTC
Is this already present in older kerenel like 2.6.20 or is it a regression?
Comment 4 Mike Harris 2007-04-14 04:38:09 UTC
Suspend hasn't worked correctly until 2.6.21-rc6, so it's a new bug.
Comment 5 Rafael J. Wysocki 2007-06-13 09:37:18 UTC
What's the current status of this bug?

Note You need to log in before you can comment on or make changes to this bug.