Backlight brightness with nvidia/nouveau

Jan 18, 11:33 AM

I’ve been having trouble controlling my Lenovo T410’s display backlight brightness under Ubuntu 10.10.

Using the nvidia driver from the restricted repositories, pressing the brightness control keys led to a short flicker at the desired brightness and then had the display return to a very low brightness. The only other options were a completely black screen and one at full brightness.

With the nouveau driver, I could not control the brightness at all. When I pressed the keys, the slider changed, but the backlight brightness did not differ.

This solution did not work. When I added “acpi_backlight=vendor” (using the nvidia driver) to the linux line in grub at boot, X would not start at all.

I downloaded the latest driver from nVidia, then removed the nvidia driver using:

sudo apt-get remove nvidia-*

After chmodding (+x) and installing the nVidia driver, the brightness controls still didn’t work. This post led to a solution. After I added the following line to xorg.conf in the “Device” section:

Option "RegistryDwords" "EnableBrightnessControl=1"

and restarted the X server, I could finally control the display brightness as desired.

Malte

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2011

Jan 4, 10:10 PM

This year is the first year with “only” one zero in the date.
Well… we spent a very quiet and silent night, playing and relaxing.

I liked it.

The new year has come
everything remains the same
even life and death

Hannah

,

say something

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Merry...

Dec 25, 11:18 AM

… christmas!

Well… presents are (not yet all but mostly) unpacked, day is slow and free from duties (which is cool!), the christmas tree is still green and prickling.

We left out church yesterday… most of us didn’t miss it, only my mother wants to go again next year.

Yeah… next year is nigh, six days until the world will not change at all, except the ten metamorphoses into eleven.

Have a nice day!

Hannah

,

say something

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Second try

Dec 16, 03:06 PM

Neverending snow
white tears falling from black sky
another cloud died

Hannah

,

say something [2]

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Angry cold

Dec 15, 02:28 PM

deafening silence
the roar of falling snowflakes
days of angry cold

Malte

,

say something

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