*** This bug is a duplicate of bug 1098216 ***
https://bugs.launchpad.net/bugs/1098216
@Jerry, the bug I dup'd to has a lot of mentions of Lenovo -- your Acer
may have made the same mistake our Lenovos did, but it might have made a
different mistake. Or maybe it's the usual "Unity forgets some settings
at reboot". You might want to report a new bug...
** This bug has been marked a duplicate of bug 1098216
Regression in brightness control on Lenovo Thinkpad X230 and X1 Carbon
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https://bugs.launchpad.net/bugs/1156477
Title:
laptop brightness keys regression
Status in “gnome-settings-daemon” package in Ubuntu:
Confirmed
Bug description:
In 12.04 LTS and 12.10, the fn+f8 and fn+f9 keys properly adjusted my
Thinkpad T530's display brightness perfectly.
I upgraded to Raring on Mar 17, and the brightness keys no longer
work. The indicator appears but the slider does not slide and the
screen brightness does not change.
The brightness slider on the brightness and lock control panel feels
like it has lost granularity -- but I cannot recall the exact behavior
of the older slider.
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https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/1156477/+subscriptions
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