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I have a Sony VAIO VPC-CW2 laptop with NVIDIA GT-320M graphics card. I can't adjust the screen brightness! Using the Fn shortcuts nothing happens (Even the brightness notification doesn't show-up!). I'm using the proprietary driver installed using Additional-Drivers.

NOTE: when using Nouveau I was able to adjust the brightness, but the brightness level didn't change in the early stages, and then brightness level changes radically with each step in the last stages. I guess it has a scale problem.

Any help with Nouveau or proprietary NVIDIA is greatly appreciated!

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This should have been reported as a bug. Vote to close =) – blueXrider Mar 1 at 16:39
This question should instead be filed as a bug report, and as such is off-topic, thanks! Instructions here. – jrg♦ Mar 1 at 16:45
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closed as off topic by jrg♦ Mar 1 at 16:45

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2 Answers

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This the classic solution, still works. In

/etc/X11/xorg.conf

put

Section "Device"
        Identifier      "nvidia"
        Driver "nvidia"
        Option  "NoLogo"        "True"
        Option "RegistryDwords" "EnableBrightnessControl=1"
EndSection

and restart your computer.

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Not worked! I have to mention that I'm using the nvidia driver recommended in 'Additional Drivers'. My xorg.conf was like this: Section "Device" Identifier "Default Device" Option "NoLogo" "True" EndSection – Seyed Mohammad Nov 16 '11 at 8:09
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up vote 0 down vote

you can try this :

edit your /etc/default/grub and add this :

GRUB_CMDLINE_LINUX=”acpi_backlight=vendor”

save and reboot your computer.

reference : https://launchpad.net/~kamalmostafa/+archive/linux-kamal-mjgbacklight

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Not worked! Pressing the Fn shortcuts for brightness still does nothing. – Seyed Mohammad Nov 4 '11 at 17:40
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