Bug 14406 - Brightness doesn't work out of the box with i965
Summary: Brightness doesn't work out of the box with i965
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: Gordon Jin
QA Contact: Xorg Project Team
URL: http://bugs.debian.org/460654
Whiteboard:
Keywords:
Depends on:
Blocks:
 
Reported: 2008-02-06 11:52 UTC by Mike Hommey
Modified: 2008-02-09 16:57 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:

Attachments

Description Mike Hommey 2008-02-06 11:52:08 UTC 
By default, on my laptop, the "kernel" BACKLIGHT_CONTROL is used, and
that doesn't quite help xbacklight to work. I don't know what X uses in
such a case, but it appears that tweaking
/sys/class/backlight/sony/brightness doesn't work (the laptop is a vaio)
either, so it might just be a problem with the kernel driver.

Anyways, switching to the "native" BACKLIGHT_CONTROL makes xbacklight
work.

This has been verified with versions 2:2.2.0+git20080107-1 and 2:2.2.0.90-1 from debian unstable.

You can find a bunch of logs and configuration information in the debian bug report: http://bugs.debian.org/460654

Please bug me if you need more info/testing.

Cheers,

Mike
Comment 1 Mike Hommey 2008-02-06 12:24:34 UTC 
And I should have read debian's changelog, because actual latest RC is 2:2.2.0.90-2, which i tested, but has the same behaviour.
Comment 2 Michael Fu 2008-02-09 16:57:37 UTC 
Mike, It looks like a kernel bug. would you please file a bug at bugzilla.kernel.org under acpi component? thanks.

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