Bug 8314 - Suspend-to-mem on MacBook destroys backlight control
Suspend-to-mem on MacBook destroys backlight control
Status: REJECTED INSUFFICIENT_DATA
Product: ACPI
Classification: Unclassified
Component: Power-Sleep-Wake
i386 Linux
: P2 normal
Assigned To: Rafael J. Wysocki
:
Depends on:
Blocks: 7216
  Show dependency treegraph
 
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
Tree: Mainline
Regression: ---


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

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?

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