*** This bug is a duplicate of bug 947748 ***
https://bugs.launchpad.net/bugs/947748
In my case, I'm using an nvidia card on a Thinkpad, with
EnableBrightnessControl set.
On at least the Intel driver, xrandr --verbose presents both 'BACKLIGHT' and
'Backlight'.
The nvidia driver (with EnableBrightnessControl set) offers only the latter.
libgnome-desktop (used by gnome-settings-daemon) seems to look for only the
former.
xbacklight looks for both names; this must be why it works when Gnome does not.
That other bug report (#947748) has several different issues lumped into it.
I'd like to remove the "duplicate" flag, since this report mentions the
xbacklight behavior.
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Packages, which is subscribed to gnome-settings-daemon in Ubuntu.
https://bugs.launchpad.net/bugs/947919
Title:
Can't change brightness with keyboard or with "Brightness and Lock"
settings panel
Status in “gnome-settings-daemon” package in Ubuntu:
Confirmed
Bug description:
gnome-settings-daemon 3.3.91-0ubuntu1, gnome-control-center
1:3.3.90-0ubuntu5, Ubuntu 12.04 beta
1. Press the Brightness keys on the keyboard.
2. In System Settings, click "Brightness and Lock".
What happens:
1. Nothing.
2. The "Brightness and Lock" panel does not contain any brightness settings.
What should happen:
1. The brightness changes.
2. The "Brightness and Lock" panel contains a brightness slider.
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https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/947919/+subscriptions
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