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Bug 747390

Summary: Brightnes keys have no effect on Asus UL20A
Product: [Fedora] Fedora Reporter: Robert Smol <smol.robert>
Component: gnome-power-managerAssignee: Richard Hughes <hughsient>
Status: CLOSED WONTFIX QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 16CC: collura, hughsient, kjiec4, rhughes
Target Milestone: ---   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
: 1028848 (view as bug list) Environment:
Last Closed: 2013-02-13 20:17:18 EST Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Description Flags
dmesg log none

Description Robert Smol 2011-10-19 13:15:10 EDT
Description of problem:
Pressing the Fn-F4 and Fn-F5 during GNOME3.2 sessions ;ldoes not change brightness. When I press it, I see the translucent notification and it changes the slider. However no effect - subsequent press will somehow delay the notification even up to 1 minute after the press.

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


I've uploaded Smolt profile at

How reproducible:

Boot into gnome and pres Fn-F4

Steps to Reproduce:
1. Boot and login
2. Press Fn key for decrease/increase
3. Wait
Actual results:

Only notification, no action.

Expected results:

Brightness is changed. I actually expects the brightness is handled automatically.

Additional info:
[root@laptop ~]# ls -l /sys/class/backlight/
total 0
lrwxrwxrwx. 1 root root 0 Oct 19 17:18 acpi_video0 -> ../../devices/pci0000:00/0000:00:02.0/backlight/acpi_video0
lrwxrwxrwx. 1 root root 0 Oct 19 17:18 intel_backlight -> ../../devices/pci0000:00/0000:00:02.0/drm/card0/card0-LVDS-1/intel_backlight
[root@laptop ~]# 

I would like to know what component is resposible for what and how I can help, Ican do some logs no problem.
Comment 1 Robert Smol 2011-10-21 18:11:24 EDT
Created attachment 529571 [details]
dmesg log

Today I've noticed there are some messags about ACPI errors, perhaps it helps
Comment 2 Robert Smol 2011-11-15 09:53:09 EST
I've modified the kernel boot to acpi_backlight=vendor, now the keys works. But once the screen is locked (inactivity), the screen is now without any backlight. I have to type my password blindly and then pres the brighntess keys to make it work. Any hints?
Comment 3 Fedora End Of Life 2013-01-16 17:45:03 EST
This message is a reminder that Fedora 16 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
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Comment 4 Fedora End Of Life 2013-02-13 20:17:22 EST
Fedora 16 changed to end-of-life (EOL) status on 2013-02-12. Fedora 16 is 
no longer maintained, which means that it will not receive any further 
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of 
Fedora please feel free to reopen this bug against that version.

Thank you for reporting this bug and we are sorry it could not be fixed.
Comment 5 Oleg Andreych 2013-11-09 14:02:25 EST
This bug is reproducible on F19