Bug 32858 - Back light not re-enabled after power save blank
Summary: Back light not re-enabled after power save blank
Status: RESOLVED NOTOURBUG
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/intel (show other bugs)
Version: unspecified
Hardware: x86-64 (AMD64) Linux (All)
: medium normal
Assignee: Chris Wilson
QA Contact: Xorg Project Team
URL:
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2011-01-05 12:42 UTC by Krzysztof Pawlik
Modified: 2011-01-11 12:46 UTC (History)
0 users

See Also:
i915 platform:
i915 features:

Attachments

Description Krzysztof Pawlik 2011-01-05 12:42:53 UTC 
x11-drivers/xf86-video-intel: 1.9.2.902
x11-base/xorg-server: 1.9.2.902
media-libs/mesa: 7.9-r1

Working kernel: 2.6.36.2
Problematic kernel: 2.6.37

After upgrading to 2.6.37 when KDE blanks the screen due to power saving settings the back light doesn't get re-enabled when there's an activity. With exactly the same software but on 2.6.36.2 it works as expected - when there's mouse or keyboard activity the screens back light gets turned on.

I've compared Xorg.0.log and there are no differences between them when running on those kernels, please ping me what I can do to help resolve the problem.

One more thing: when the screen is "on" without back light suspending the machine (STR) and waking it up results in back light being turned on.
Comment 1 Krzysztof Pawlik 2011-01-11 12:16:21 UTC 
Happens also with Intel driver version 2.14.0.
Comment 2 Krzysztof Pawlik 2011-01-11 12:46:39 UTC 
Thank you Chris for pointing this url out. I'll close this bug then and keep tracing the issue in kernel bugzilla.

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