Bug 75441

Summary: Screen Brightness Control on XPS-13 Inoperative
Product: Drivers Reporter: Garry Williams (gtwilliams)
Component: Video(DRI - Intel)Assignee: Antti Koskipaa (antti.koskipaa)
Status: RESOLVED MOVED    
Severity: normal CC: intel-gfx-bugs
Priority: P1    
Hardware: x86-64   
OS: Linux   
Kernel Version: 3.14.2-200.fc20.x86_64 Subsystem:
Regression: No Bisected commit-id:

Description Garry Williams 2014-05-03 20:15:41 UTC
This is a regression.

Brightness control stopped working on Dell XPS-13 after installing
3.14.2-200.fc20.x86_64.  Previous kernel was 3.13.10-200.fc20.x86_64.
OSD shows changes when Fn-F[45] are pressed or when idle kicks in
dimming, but actual screen brightness remains unchanged.

Also reported here:

    https://bugzilla.redhat.com/show_bug.cgi?id=1093764
Comment 1 Jani Nikula 2014-05-05 10:53:31 UTC
Duplicate of https://bugs.freedesktop.org/show_bug.cgi?id=76276. See http://mid.gmane.org/cover.1398678778.git.jani.nikula@intel.com for patch submitted for 3.14 stable.

Note that https://bugzilla.redhat.com/show_bug.cgi?id=1093764#c2 is a different issue.