Bug 1154431

Summary: Backlight control buttons do not control backlight on ASUS Zenbook UX301LA
Product: [Fedora] Fedora Reporter: Paul Novak <pnovak>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED INSUFFICIENT_DATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 21CC: dobmec, gansalmon, itamar, jonathan, kernel-maint, madhu.chinakonda, mchehab
Target Milestone: ---   
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Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
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Clone Of: Environment:
Last Closed: 2015-02-24 16:13:53 UTC Type: Bug
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
dmi command output
none
dmesg output
none
dmesg output none

Description Paul Novak 2014-10-19 16:40:59 UTC 
Created attachment 948312 [details]
dmi command output

Description of problem:
The backlight control buttons (Fn+F5 for dimming, Fn+F6 for brightening) do not change the brightness on ASUS Zenbook UX301LA. Following the troubleshooting guidelines here:
http://hansdegoede.livejournal.com/13889.html

the dmi.log and dmesg output are attached for kernel version 3.16.1-301.fc21.x86_64 included in the Fedora 21 alpha release.

No onscreen display is shown when pressing the backlight control keys and evemu-record does not show any events occurring when pressing these buttons for any input device.
Comment 1 Paul Novak 2014-10-19 16:41:40 UTC 
Created attachment 948313 [details]
dmesg output
Comment 2 Josh Boyer 2014-10-20 12:22:04 UTC 
This is a known issue.  The upstream kernel cannot handle the way these machines have their devices setup in ACPI.  See https://bugs.freedesktop.org/show_bug.cgi?id=81762
Comment 3 Justin M. Forbes 2015-01-27 14:59:06 UTC 
*********** MASS BUG UPDATE **************

We apologize for the inconvenience.  There are a large number of bugs to go through and several of them have gone stale.  Due to this, we are doing a mass bug update across all of the Fedora 21 kernel bugs.

Fedora 21 has now been rebased to 3.18.3-201.fc21.  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 experience different issues, please open a new bug report for those.
Comment 4 Fedora Kernel Team 2015-02-24 16:13:53 UTC 
*********** MASS BUG UPDATE **************
This bug is being closed with INSUFFICIENT_DATA as there has not been a response in over 3 weeks. If you are still experiencing this issue, please reopen and attach the relevant data from the latest kernel you are running and any data that might have been requested previously.
Comment 5 Dobmec 2015-03-11 15:42:04 UTC 
Created attachment 1000546 [details]
dmesg output
Comment 6 Dobmec 2015-03-11 15:43:06 UTC 
I have the same problem with a ASUS Zenbook UX31A, with kernel 3.18.8 on Fedora 21. Strangely, the control buttons where working with my previous F19 installation.