Bug 677417 - Backlight regression (2.6.38)
Summary: Backlight regression (2.6.38)
Keywords:
Status: CLOSED RAWHIDE
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel
Version: rawhide
Hardware: Unspecified
OS: Unspecified
unspecified
unspecified
Target Milestone: ---
Assignee: Kernel Maintainer List
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2011-02-14 17:28 UTC by Jaroslav Reznik
Modified: 2011-02-18 18:04 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2011-02-18 18:04:32 UTC
Type: ---
Embargoed:

Attachments (Terms of Use)
dmesg (54.44 KB, application/octet-stream)
2011-02-14 17:32 UTC, Jaroslav Reznik 		no flags Details
Dmesg output (65.86 KB, application/octet-stream)
2011-02-14 17:35 UTC, Jaroslav Reznik 		no flags Details
dmidecode output (8.54 KB, application/octet-stream)
2011-02-14 17:39 UTC, Jaroslav Reznik 		no flags Details
Show Obsolete (1) View All

Description Jaroslav Reznik 2011-02-14 17:28:28 UTC 
Description of problem: there's a regression in 2.6.38 kernels that breaks backlight support on Lenove S10-3t. It is working with older kernels (tried it).

Version-Release number of selected component (if applicable):
latest Rawhide kernel

How reproducible:
everytime

Actual results:
1. no device in /sys/class/backlight/
2. no backlight support in xrandr (xrandr --properties)

Expected results:
Backlight settings working again ;-)

Additional info:
It's possible it's this bug https://bugzilla.kernel.org/show_bug.cgi?id=27702 but I don't see any relation to suspend/resume. See also http://comments.gmane.org/gmane.linux.kernel/1090610
Comment 1 Jaroslav Reznik 2011-02-14 17:32:20 UTC 
Created attachment 478673 [details]
dmesg
Comment 2 Jaroslav Reznik 2011-02-14 17:35:17 UTC 
Created attachment 478674 [details]
Dmesg output

Sorry for older dmesg. Fixed.
Comment 3 Jaroslav Reznik 2011-02-14 17:39:43 UTC 
Created attachment 478675 [details]
dmidecode output
Comment 4 Chuck Ebbert 2011-02-16 14:00:39 UTC 
I suspect this is fixed in 2.6.38-rc5 (commit ed764e7ca042dbf4cc1c7f4e12cd842c7789f133).
Comment 5 Fedora Update System 2011-02-17 05:59:36 UTC 
kernel-2.6.38-0.rc5.git1.1.fc15 has been submitted as an update for Fedora 15.
https://admin.fedoraproject.org/updates/kernel-2.6.38-0.rc5.git1.1.fc15
Comment 6 Fedora Update System 2011-02-18 06:56:38 UTC 
kernel-2.6.38-0.rc5.git1.1.fc15 has been pushed to the Fedora 15 stable repository.  If problems still persist, please make note of it in this bug report.
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