Take the 2-minute tour ×
Unix & Linux Stack Exchange is a question and answer site for users of Linux, FreeBSD and other Un*x-like operating systems.. It's 100% free, no registration required.

I am using Fedora 13 and whenever I Restart or Logoff on my laptop. The screen brightness resets to its maximum value. I am not aware of this problem. Can anyone tell me why this is causing and what is the solution for keeping it's to a constant value at all time?

share|improve this question
    
Curiously, how do you change the brightness? –  Tshepang Mar 17 '11 at 10:16
1  
@Tshepang : I change it simply by pressing Fn+F4 or Fn+F5 Keys. As it's default keys for this and marked symbol for that in my Dell Laptop. –  Vikas Patidar Mar 17 '11 at 10:19
1  
You need to say what exact laptop model you have, and also what graphics card. –  Gilles Mar 17 '11 at 20:26
add comment

2 Answers

up vote 2 down vote accepted

You might want to check out the following bugs for possible explanations:

It seems that your problem is likely being caused either by gdm or by a bug in gnome-power-manager. If it's the former, then the last bug above points to a discussion that contains a possible solution (see the post by swmail), however, I don't know if it will work in your case (let us know what happens, and we'll work from there ...).

If it's gnome-power-manager causing the problem, it seems that the bug still hasn't been fixed.

share|improve this answer
add comment

The solution is to use the following command at startup:

echo 0 /sys/class/backlight/acpi_video0/brightness

Probably you can have a look at this link, which provides a workaround till you get a fix from distribution.

share|improve this answer
add comment

Your Answer

 
discard

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.