Kernel Bug Tracker – Bug 8314
Suspend-to-mem on MacBook destroys backlight control
Last modified: 2007-08-08 10:20:21 UTC
Distribution: Fedora Core 6
Hardware Environment: MacBook Core Duo
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.
Created attachment 11108 [details]
Created attachment 11109 [details]
Output of dmesg
Is this already present in older kerenel like 2.6.20 or is it a regression?
Suspend hasn't worked correctly until 2.6.21-rc6, so it's a new bug.
What's the current status of this bug?