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I recently upgraded from Ubuntu 13.10 to 14.04. Everything is fine, except the brightness of my laptop screen. When I change the brightness the screen simply does not respond. I figured this was a graphics driver issue, but having updated and reinstalled all nvidia drivers the problem persists. It's rather nasty, as the screen is now permanently set to the darkest setting, making it almost impossible to see anything.

I also tried the solution proposed here: Ubuntu 14.04 - brightness problem in HP hybrid laptop but this, sadly, didn't help either.

I have a HP Elitebook 8560w, with an nvidia Quadro 1000M and am running the latest nvidia-current drivers available in the apt-get repo's

For the record, I tried experimental nvidia drivers, which consequently crashed my entire OS. Therefore, I reinstalled 14.04 cleanly, yet this problem still persists

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Same issue with clean 14.04 installation on HP ProBook 470 with AMD HD 8750M 2GB. Screen brightness always set to maximum. I use default Ubuntu drivers as AMDs are not available. –  user2655700 Apr 30 at 11:34
    
I've noticed some new behaviour. When I suspend Ubuntu and wake it up again, the brightness is considerable higher. I still can't adjust it, but it is workable (which is some progress at least) –  danielvdende Jul 15 at 7:17
    
I have this exact computer, and am experiencing this issue too, except my brightness is constantly at maximum. Did you ever find a solution? –  Seth Sep 4 at 2:22
    
@Seth No not yet. Though I think I have the max brightness thing too after I have suspended Ubuntu. Very frustrating for such a simple (yet essential) function to be so broken... –  danielvdende Sep 4 at 7:04

1 Answer 1

I got it to work on a Lenovo W510 with a Quadro FX 880M by creating /usr/share/X11/xorg.conf.d/20-nvidia.conf with the following contents:

Section "Device"
    Identifier    "Device0"
    Driver        "nvidia"
    VendorName    "NVIDIA Corporation"
    BoardName     "Quadro FX 880M"
    Option        "RegistryDwords" "EnableBrightnessControl=1"
EndSection

After reboot my brightness controls work correctly.

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Just tried this, sadly to no avail :( –  danielvdende Sep 2 at 8:20

protected by Community Nov 2 at 21:29

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