Red Hat Bugzilla – Full Text Bug Listing
|Summary:||Brightness keys (Fn+Home and Fn+End) don't work on ThinkPad T61|
|Product:||[Fedora] Fedora||Reporter:||Miro Hrončok <mhroncok>|
|Component:||xorg-x11||Assignee:||X/OpenGL Maintenance List <xgl-maint>|
|Status:||CLOSED DEFERRED||QA Contact:|
|Fixed In Version:||Doc Type:||Bug Fix|
|Doc Text:||Story Points:||---|
|Last Closed:||2013-01-11 13:15:35 EST||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
Description Miro Hrončok 2012-03-10 13:31:33 EST
Description of problem: Brightness keys (Fn+Home and Fn+End) don't work on a ThinkPad T61 with Nvidia Quadro NVS 140M. How reproducible: The keys don't work with nouveau and don't work with kmod-nvidia. Steps to Reproduce: 1. Hold Fn 2. Press Home or End Actual results: Nothing happens. Expected results: Screen brightness should change. Additional info: Echoing values between 0-15 to /sys/class/backlight/acpi_video0 works as expected. The keys send XF86MonBrightnessUp and XF86MonBrightnessDown as expected.
Comment 1 Jaroslav Škarvada 2012-03-21 12:31:53 EDT
I think this is not xorg-x11 problem. AFAIK it is your desktop software who catch the brightness up/down events and controls the backlight through kernel interface, i.e. in Gnome it is the gnome-settings-daemon, in XFCE it is xfce4-power-manager. These daemons supports several interfaces. I think they prefer nv_backlight interface over acpi_video0 interface (if nouveau is used).
Comment 2 Adrin Jalali 2012-10-13 16:23:57 EDT
Okay, so what's the solution, I have the same problem here with F(17) latest updates up to this date.
Comment 3 Adrin Jalali 2012-10-13 16:38:32 EDT
I found something here: http://forums.fedoraforum.org/showthread.php?t=276516 to add Option "RegistryDwords" "EnableBrightnessControl=1" to the xorg.conf. It fixed my problem anyway.
Comment 4 Miro Hrončok 2013-01-11 13:15:35 EST
My T61 is dead, so I'm closing this one, feel free to reopen, if someone else worry.