Bug 1123565

Summary: Brightness keys do not work HP Elitebook 745 G2
Product: [Fedora] Fedora Reporter: Alexander Lindqvist <alexander>
Component: kernelAssignee: Kernel Maintainer List <kernel-maint>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact: Hans de Goede <hdegoede>
Priority: unspecified    
Version: 20CC: gansalmon, hdegoede, itamar, jonathan, kernel-maint, madhu.chinakonda, mchehab
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: kernel-3.15.7-200.fc20 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2014-08-01 06:02:00 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Alexander Lindqvist 2014-07-26 16:14:29 UTC 
Description of problem:
Brightness keys works but no difference in brightness

# grep '.*' /sys/class/dmi/id/*_* 2> /dev/null

/sys/class/dmi/id/bios_date:05/19/2014
/sys/class/dmi/id/bios_vendor:Hewlett-Packard
/sys/class/dmi/id/bios_version:M84 Ver. 01.01
/sys/class/dmi/id/board_asset_tag:Base Board Asset Tag
/sys/class/dmi/id/board_name:221C
/sys/class/dmi/id/board_vendor:Hewlett-Packard
/sys/class/dmi/id/board_version:KBC Version 63.13
/sys/class/dmi/id/chassis_asset_tag:XXXXXXXXXXX
/sys/class/dmi/id/chassis_type:10
/sys/class/dmi/id/chassis_vendor:Hewlett-Packard
/sys/class/dmi/id/chassis_version:
/sys/class/dmi/id/product_name:HP EliteBook 745 G2
/sys/class/dmi/id/product_version:A3009DD10303
/sys/class/dmi/id/sys_vendor:Hewlett-Packard


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


How reproducible:


Steps to Reproduce:
1. FN+F9-F10
2.
3.

Actual results:


Expected results:


Additional info:

Same problem as https://bugzilla.redhat.com/show_bug.cgi?id=903136

video.use_native_backlight=1 works and solves the problem.
Tested on 3.15.6-200.fc20.x86_64
Comment 1 Hans de Goede 2014-07-28 15:58:40 UTC 
I've added a patch for this to the official Fedora 20 kernel packages, so it should get picked up by the next F-20 kernel build. When that happens please test without video.use_native_backlight=1 on the kernel commandline and confirm that everything still works as it should.
Comment 2 Hans de Goede 2014-07-28 15:59:03 UTC 
p.s. And thanks for the bug report!
Comment 3 Fedora Update System 2014-07-29 03:56:11 UTC 
kernel-3.15.7-200.fc20 has been submitted as an update for Fedora 20.
https://admin.fedoraproject.org/updates/kernel-3.15.7-200.fc20
Comment 4 Fedora Update System 2014-07-30 07:03:34 UTC 
Package kernel-3.15.7-200.fc20:
* should fix your issue,
* was pushed to the Fedora 20 testing repository,
* should be available at your local mirror within two days.
Update it with:
# su -c 'yum update --enablerepo=updates-testing kernel-3.15.7-200.fc20'
as soon as you are able to, then reboot.
Please go to the following url:
https://admin.fedoraproject.org/updates/FEDORA-2014-9010/kernel-3.15.7-200.fc20
then log in and leave karma (feedback).
Comment 5 Fedora Update System 2014-08-01 06:02:00 UTC 
kernel-3.15.7-200.fc20 has been pushed to the Fedora 20 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 6 Alexander Lindqvist 2014-08-01 11:33:25 UTC 
kernel-3.15.7-200 confirmed working without using video.use_native_backlight=1

Thanks Hans for your quick update!