Screen brightness controller stops work after sleep mode

**Teraspes** · September 20th, 2011

Hi!

I have a Toshiba R830 laptop. The problem I have is that the screen brightness controller stops work after I resume the computer from sleep mode. If I do a complete reboot - I can change the screen brightness. It works if I wake it up from hibernate too. But not from Suspend.

I have tried to set the brightness from the terminal too - but it doesn't work either.

Code:

sudo pkexec gnome-power-backlight-helper --set-brightness 1

doesn't do anything. Neither does:

Code:

sudo acpitool -l 1

Does anybody here know if this is possible to solve in some way? Is it possible to restart a fitting daemon or something? Or are there any logs that I should look in?

I'm thankful for all answers.

**faceonline** · September 22nd, 2011

+1 Toshiba R700. Only noticed this the other day. Have you tried restarting X? Not that that's a fix though...

**technosysind** · September 22nd, 2011

What are your settings in power management??

**filipejps** · October 1st, 2011

Same problem here with my Toshiba tecra m11

**Teraspes** · October 24th, 2011

I'm sorry, I forgot this thread. I still have the problem. :/

Originally Posted by faceonline

+1 Toshiba R700. Only noticed this the other day. Have you tried restarting X? Not that that's a fix though...

No, how do I do that?

Originally Posted by technosysind

What are your settings in power management??

Umm..
On Battery Power:
Put computer to sleep ..: never
Lid closed: Suspend
Battery critically low: Suspend
Spin down hard disks: checked
Put display to sleep ...: 0:30
Reduce backlight: unchecked
Dim display when idle: unchecked

**Sonador** · January 21st, 2012

Any ideas? Same problem on Acer Extensa with GMA 4500

I have read a lot of posts about this issue but have found no solution. It is annoying and it affects different distros, I read even several posts about the problem on Windows...huh