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Bug 1515205

Summary: [REGRESSION] Brightness not able to be controlled on Lenovo P50
Product: [Fedora] Fedora Reporter: Pete Savage <psavage>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED DUPLICATE QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: unspecified    
Version: 27CC: airlied, ajax, bskeggs, ewk, hdegoede, ichavero, itamar, jarodwilson, jcline, jeremy, jglisse, john.j5live, jonathan, josef, kernel-maint, kherbst, labbott, linville, mchehab, mjg59, psavage, steved
Target Milestone: ---Flags: kherbst: needinfo-
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
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Fixed In Version: Doc Type: If docs needed, set a value
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Story Points: ---
Clone Of: Environment:
Last Closed: 2018-02-28 16:07:31 UTC Type: Bug
Regression: --- Mount Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Pete Savage 2017-11-20 11:49:42 UTC
Description of problem: Brightness not able to be controlled in on Lenovo P50

Version-Release number of selected component (if applicable): Fedora25/26 Kernel 4.13.11+


How reproducible: 100%


Steps to Reproduce:
1. Use Fedora25/26 with the latest kernel
2.
3.

Actual results: Brightness in gnome is no longer controllable


Expected results: Brightness hsould be able to be controlled


Additional info: This used to work on older kernel image 4.13.5

Comment 1 Pete Savage 2017-11-20 11:50:49 UTC
It should be noted that the BIOS was set to Discrete graphics only

Comment 2 Jeremy Cline 2017-11-20 14:46:52 UTC
Hey,

Thank you for the bug report. Did this work in 4.13.10 and first appear in 4.13.11, or did it break sometime between 4.13.5 and 4.13.11? If the latter is true, could you narrow down which stable release introduced the regression?

The old kernel builds are available on Koji: https://koji.fedoraproject.org/koji/packageinfo?packageID=8

Thanks!

Comment 3 Pete Savage 2018-01-08 13:22:18 UTC
I think this is a dupe of https://bugzilla.redhat.com/show_bug.cgi?id=1511786

Comment 4 Laura Abbott 2018-02-28 03:45:59 UTC
We apologize for the inconvenience.  There is a large number of bugs to go through and several of them have gone stale. The kernel moves very fast so bugs may get fixed as part of a kernel update. Due to this, we are doing a mass bug update across all of the Fedora 26 kernel bugs.
 
Fedora 26 has now been rebased to 4.15.4-200.fc26.  Please test this kernel update (or newer) and let us know if you issue has been resolved or if it is still present with the newer kernel.
 
If you have moved on to Fedora 27, and are still experiencing this issue, please change the version to Fedora 27.
 
If you experience different issues, please open a new bug report for those.

Comment 5 Pete Savage 2018-02-28 12:37:50 UTC
I believe there is a fix for this, Karol?

Comment 6 Laura Abbott 2018-02-28 16:07:31 UTC
I'm just going to mark as a duplicate

*** This bug has been marked as a duplicate of bug 1511786 ***