Bug 1377123

Summary: Screen brightness broken after kernel 4.6.7-200
Product: [Fedora] Fedora Reporter: jberry02
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: unspecified    
Version: 23CC: gansalmon, ichavero, itamar, jonathan, kernel-maint, madhu.chinakonda, mchehab, m.oliver
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
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Last Closed: 2016-10-17 12:51:17 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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output of dmesg none

Description jberry02 2016-09-18 18:24:16 UTC 
Description of problem: Unable to adjust screen brightness on Dell XPS 13.  Fn keys show the bios gauge, but don't do anything.  Brightness slide from within KDE power management settings don't do anything.  Everything works with kernel 4.6.7-200.fc23.x86_64, but fails with 4.7.2-101.fc23.x86_64 and 4.7.3-100.fc23.x86_64.


Version-Release number of selected component (if applicable): 4.7.2-101.fc23.x86_64 and 4.7.3-100.fc23.x86_64.


How reproducible:  Always


Steps to Reproduce:
1.Boot affected kernel
2.attempt to adjust the screen brightness
3.

Actual results:Screen brightness cannot be adjusted.


Expected results:Screen brightness can be adjusted.


Additional info: Bug/error introduced between 4.6.7-200.fc23.x86_64 and 4.7.2-101.fc23.x86_64.
Comment 1 m.oliver 2016-09-27 21:09:58 UTC 
Exactly the same here.  I attach my demsg output for detailed hardware information.
Comment 2 m.oliver 2016-09-27 21:10:32 UTC 
Created attachment 1205329 [details]
output of dmesg
Comment 3 jberry02 2016-10-15 22:19:24 UTC 
Problem appears to be resolved in kernel 4.7.7-100.fc23.x86_64.
Comment 4 m.oliver 2016-10-16 11:53:20 UTC 
Yes, it's resolved, already in 4.7.6-100.fc23.x86_64