Bug 60670 - [3.11 Regression, Bisected]: hp-wmi: backlight brightness not changeable with fn keys
Summary: [3.11 Regression, Bisected]: hp-wmi: backlight brightness not changeable with...
Status: RESOLVED CODE_FIX
Alias: None
Product: Drivers
Classification: Unclassified
Component: Platform_x86 (show other bugs)
Hardware: All Linux
: P1 normal
Assignee: drivers_platform_x86@kernel-bugs.osdl.org
URL:
Keywords:
: 60654 (view as bug list)
Depends on:
Blocks:
 
Reported: 2013-07-31 19:31 UTC by Thomas Lange
Modified: 2013-10-28 16:28 UTC (History)
3 users (show)

See Also:
Kernel Version: 3.11
Subsystem:
Regression: Yes
Bisected commit-id:

Attachments
git-bisect log (2.73 KB, text/x-log)
2013-07-31 19:31 UTC, Thomas Lange 		Details
Add an attachment (proposed patch, testcase, etc.)

Description Thomas Lange 2013-07-31 19:31:54 UTC 
Created attachment 107067 [details]
git-bisect log

The fn brightness keys of my Laptop (HP 625) are not working anymore
since kernel version 3.11-rc1.

With older kernels of the 3.10 branch they are working fine.

Setting the brightness manually with
"echo number > /sys/class/backlight/acpi_video0/brightness"
works though.

I have bisected the bug to commit 
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b253c9d1d858a3f115f791ee4fe2b9399ae7dbbd
The full git-bisect log is attached.

Reverting only this commit made the buttons work again.

Please let me know if you need more information.
Thanks.
Comment 1 Aaron Lu 2013-08-09 00:42:56 UTC 
*** Bug 60654 has been marked as a duplicate of this bug. ***
Comment 2 Aaron Lu 2013-08-09 00:47:41 UTC 
Charles has the same problem since v3.11-rc1 and revert the above commit makes hotkey work again. His laptop is: HP Elitebook 8560w with nVidia 1000m.
Comment 3 Thomas Lange 2013-08-14 12:31:05 UTC 
The model HP Compaq nc6400 of a friend is also affected by this bug.
Comment 4 Thomas Lange 2013-09-03 16:06:05 UTC 
The bisected commit was reverted before the final 3.11 release.
Marking as RESOLVED.

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/platform/x86/hp-wmi.c?id=41c8bd1c75ef8e8566eca6b1c7bc273bc282f495
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