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On the previous versions the default screen brightness was perfect for me but on 11.10 the default brightness is killing my eye.

I have changed the brightness like this level

enter image description here

but after restarting and every login/logout it returns to default 100%.

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@Achu - have you looked at the answers in the duplicate question flagged by Jorge? or have you solved the problem some other way. Can you provide some updated information if not I will flag to close the question as a duplicate. – Mark Rooney Feb 28 '12 at 1:47
@MarkRooney Hey, thanks! i forgot my question and i tried to fix others question. that is.... anyway please look at my answer and let me know if you have any suggestion. Thanks again! – Achu Feb 28 '12 at 7:16

3 Answers

up vote 1 down vote accepted

It was a bug on 11.10 kernel 3.0.0-12-generic and i was reported on lunchpad

https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/875061

and another report i linked on

https://bugs.launchpad.net/ubuntu/+source/gnome-control-center/+bug/870805

As they suggested and when 3.1 released i have installed it, after that i never faced this problem. Currently i'm on kernel 3.1.0-030100-generic

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up vote 0 down vote

Maybe you can try Ishans Python script: http://blog.ishans.info/2011/09/25/set-brightness-automatically-at-the-startup-in-linux/

This stores the current brighness-Information until the next boot.

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up vote 0 down vote

From Ubuntu 10.04 to 11.10 I can not change my screen brightness. I use an Acer laptop with VGA Intel HD graphic 3000, and I think this is because my laptop (I tried to update BIOS two or three times so I think that make problems)

I must use xbrightness to fix my problem. You can try to install this package.

It requires some packages like: xutils-dev, libxxf86vm-dev, libxaw7-dev. After installation finish. You can change the brightness by run for example:

$ xbrightness 50000

You can read more on the man page or home site of xbrightness.

You can use this program while waiting for the bug fixed.

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