Bug 677417

Summary: Backlight regression (2.6.38)
Product: [Fedora] Fedora Reporter: Jaroslav Reznik <jreznik>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED RAWHIDE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: rawhideCC: gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda
Target Milestone: ---   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2011-02-18 18:04:32 UTC Type: ---
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description Flags
dmesg
none
Dmesg output
none
dmidecode output none

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.