Bug 23023

Summary: no backlight support in /sys or /proc ; xbacklight not working
Product: xorg Reporter: schmirrwurst
Component: Driver/nouveauAssignee: Nouveau Project <nouveau>
Status: RESOLVED FIXED QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium    
Version: git   
Hardware: x86-64 (AMD64)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:

Description schmirrwurst 2009-07-29 11:01:53 UTC
I've a sony vgn-fz-21e, and have no backlight information
in /proc/acpi/video
nor 
in /sys/class/backlight

My card is a nVidia Corporation G86 [GeForce 8400M GT] (rev a1)

the nouveau driver version is :
git+20090724


xbacklight is also not working
Comment 1 schmirrwurst 2009-07-29 11:09:29 UTC
I've also reported by ubuntu, apport updated a lot of additional informations/log files there : https://bugs.launchpad.net/nouveau/+bug/405387

I experience the same pb with the proprietary driver
Comment 2 schmirrwurst 2009-08-17 08:15:00 UTC
It was working properly with the latest git version... closing...
Comment 3 Ian Pilcher 2011-04-06 09:45:08 UTC
I'm not getting any backlight support here:

[ipilcher@localhost ~]$ lspci | grep VGA
01:00.0 VGA compatible controller: nVidia Corporation GT218 [NVS 3100M] (rev a2)
[ipilcher@localhost ~]$ xrandr
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192
LVDS-1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 344mm x 193mm
   1920x1080      60.0*+   60.0     50.0  
   1680x1050      60.0  
   1400x1050      60.0  
   1280x1024      59.9  
   1280x960       59.9  
   1152x864       60.0  
   1024x768       59.9  
   800x600        59.9  
   640x480        59.4  
   720x400        59.6  
   640x400        60.0  
   640x350        59.8  
VGA-1 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)
[ipilcher@localhost ~]$ xbacklight
No outputs have backlight property

nouveau version is xorg-x11-drv-nouveau-0.0.16-13.20101010git8c8f15c.fc14.x86_64
Comment 4 Alex Mayorga Adame 2012-04-02 13:50:57 UTC
Ended up here looking for a solution to "Fn+F5 and Fn+F6 don't modify brightness on Sony VAIO VPCCW (GT 230M)"[1]

Posting the card details below in case they're useful to anyone.

[1] https://bugs.launchpad.net/ubuntu/+source/linux/+bug/551668

alex-mayorga@VPCCW1FFXL:~$ lspci | grep VGA
01:00.0 VGA compatible controller: NVIDIA Corporation GT216 [GeForce GT 230M] (rev a2)
alex-mayorga@VPCCW1FFXL:~$ xrandr
Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192
LVDS-1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 309mm x 174mm
   1366x768       59.9*+
   1024x768       59.9  
   800x600        59.9  
   640x480        59.4  
   720x400        59.6  
   640x400        60.0  
   640x350        59.8  
VGA-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
alex-mayorga@VPCCW1FFXL:~$ apt-cache policy xserver-xorg-video-nouveau
xserver-xorg-video-nouveau:
  Installed: 1:0.0.16+git20111201+b5534a1-1build2
  Candidate: 1:0.0.16+git20111201+b5534a1-1build2
  Version table:
 *** 1:0.0.16+git20111201+b5534a1-1build2 0
        500 http://archive.ubuntu.com/ubuntu/ precise/main amd64 Packages
        100 /var/lib/dpkg/status
alex-mayorga@VPCCW1FFXL:~$ uname -a
Linux VPCCW1FFXL 3.2.0-21-generic #34-Ubuntu SMP Fri Mar 30 04:25:35 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
Comment 5 Ilia Mirkin 2013-08-25 04:44:00 UTC
Re-closing this. The people who reopened posters (a) had totally different hardware, (b) did not provide any actual info, and (c) didn't add themselves to cc.

If someone should still have issues regarding backlight, please file a full issue as instructed by http://nouveau.freedesktop.org/wiki/Bugs/

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.