This question is somewhat related to this question: Brightness is reset to Maximum on every Restart
Basically, I modified /etc/rc.local
to set the brightness, as detailed in this answer, so on startup the brightness does get set to the correct value. However, when I suspend my laptop and wake it up, or simply close the screen and reopen it, the brightness gets reset to the maximum.
My machine runs Ubuntu 14.04 + Gnome 3. The machine is a Thinkpad X1 Carbon.
What's the solution?
Best Answer
For waking up from suspension, I create the following script
/etc/pm/sleep.d/brightness
:And the permission of the script is
-rwxr-xr-x
. This should also solve your problem.But if the screen is dimmed, the brightness is set to maximum after recovering from the dimming.
This is really a bug which should be fixed.
I am using ubuntu 64 bit 14.04 with a Thinkpad T440s.