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rs87424
October 13th, 2010, 04:09 AM
I just upgraded to 10.10 yesterday and when I try to change the brightness using Fn arrowLEFT or arrowRIGHT with my Acer Aspire nothing happens. My screen is stuck at 100% and its blindingly bright for me it gives me a headache. The brightness app doesn't work either btw

rs87424
October 14th, 2010, 07:59 AM
I still haven't found a workaround yet

GabrielYYZ
October 14th, 2010, 08:24 AM
you can try compiz, it has an option under accessibility to control brightness.

if you don't have it, search for compiz in the software center and download "advanced desktop effects settings (ccsm)" and try it, hopefully, it'll work.

rs87424
October 15th, 2010, 01:14 AM
I got the software and the brightness does change now. But the only thing I see that is different is how the dimming effects the graphics compared to normal dimming

morad
October 27th, 2010, 02:52 AM
Hi I am having the same problem with a DELL Precision M6400 laptop.
I have had 9.10 and 10.04 installed on this laptop as well and they both recognised the Fn+up and down arrow keys to reduce or increase the LCD brightness but 10.10 does not do that.

Any suggestions would be very much appreciated.

morad
January 29th, 2011, 02:58 AM
Just install the compiz config and then configure the shortkey for brightness

evangelder
February 6th, 2011, 05:18 AM
using compiz doesn't really work for me.

3602
February 6th, 2011, 05:22 AM
Try adjusting the slider in Power Manager. My keyboard shortcuts don't work either but I can change it in Power Manager.

evangelder
February 6th, 2011, 05:31 AM
I've tried power manager but that doesn't adjust anything either.

jonnny_j22
February 6th, 2011, 06:30 AM
you can try xbacklight:

sudo apt-get install xbacklight


then set 40% or 60% brightness

$ xbacklight -set 40

$ xbacklight -set 60



you can also look in your bios - my old laptop had display settings that could be set to auto - for windows or 'other' - for linux. Note that for me whichever I chose meant that brightness did not work in the other OS.

Not a fix I know, but I have also found you can get round it sometimes by turning the laptop on unplugged.