gsd-backlight-helper fails to change backlight
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
gnome-settings-daemon (Ubuntu) |
Confirmed
|
Low
|
Unassigned |
Bug Description
In Saucy Salamander (Ubuntu 13.10), nothing happens when programmatically changing the backlight using the command:
pkexec /usr/lib/
After issuing the above-mentioned command:
1. There is no difference in the screen brightness.
2. The slider in the "System Settings" -> "Brightness & Lock" remains unchanged.
However, the value specified with --set-brightness argument is correctly reflected in the file:
/sys/class/
and
/sys/class/
Additionally, I'm using the proprietary Video driver for the AMD graphics accelerators from fglrx-updates. (I can't use the X.org X Server open source driver, because I get a lot of visual artefacts / screen refresh problems when I use it).
Furthermore, adjusting the brightness directly from the GUI, using the slider in "System Settings" -> "Brightness & Lock" works correctly, changing the screen brightness, as is expected. This change in screen brightness can be confirmed by issuing the following commands:
pkexec /usr/lib/
and
cat /sys/class/
and
cat /sys/class/
Ubuntu Release:
-------
Description: Ubuntu 13.10
Release: 13.10
Package version:
-------
gnome-settings-
Installed: 3.8.5-0ubuntu11.1
Candidate: 3.8.5-0ubuntu11.1
Version table:
*** 3.8.5-0ubuntu11.1 0
500 http://
100 /var/lib/
3.8.5-0ubuntu9 0
500 http://
Expected Behavior:
-------
After issuing the command pkexec /usr/lib/
1. The screen brightness should increase or decrease as per the XX value specified.
2. The slider in the "System Settings" -> "Brightness & Lock" should change to reflect the new value.
What Happens Instead:
-------
1. There is no difference in the screen brightness.
2. The slider in the "System Settings" -> "Brightness & Lock" remains unchanged.
Any update on this? Do you need more info on this bug? Please let me know.