Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I want to reduce the brightness of my monitor as per my wish . But ubuntu System->Prefernce->Monitor doesn't have options and I think that coz it uses generic drivers . How do I fix this problem ?

Model is Acer One Zg5 , Ubuntu 10.10 OS . Do I load the LCD driver ? I think it has a intel based inbuilt GFX card .

/proc/acpi/video/OVGA/LCD$ cat * device_id: 0x0400 type: UNKNOWN known by bios: no state: 0x1d query: 0x00

share|improve this question
up vote 0 down vote accepted

What happens if you exec $ cat /proc/acpi/video/DGFX/LCD/brightness ? Do you have any brightness dev file in your /proc/acpi/video/OVGA? If yes, then try to adjust that value using echo 100 > /proc/acpi/video/DGFX/LCD/brightness else put a comment… ;)

share|improve this answer
Using pastebin as its clunky format : – Nishant Mar 12 '11 at 17:25
Not sure what this means...? – slotishtype Jul 18 '11 at 10:26

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.