View Full Version : [ubuntu] Screen brightness in too low

April 24th, 2008, 07:00 AM
I have installed Hardy in my laptop Acer Aspire 5710. Everything goes fine (except two things).

* Touch pad is a **** now (like earlier versions). Anyway, I dont use it. So doesnt matter for me.

* Screen contrast is too low. With AC power it seems I am running on my battery.

I did a try by changing gamma. But monitor is still without bright glossy look.. :-(.

Any suggestion on how to increase brightness contrast in the monitor ?

April 25th, 2008, 05:56 AM
i am having the same issue with an ASUS M50SV-A1 laptop, screen brightness is just too low to begin with, i tried using the nvidia panel after installing the drivers but it just don't work properly as the brightness is so low to begin with that adjusting brightness/contrast/gamma thru it does not work

April 25th, 2008, 11:59 AM
I have problem too. After update from Ubuntu 7.10 to 8.04 on my notebook Asus U5F, when X start - display brightness very low (minimal level).
When notebook shutdown or reboot brightness still very low too.
Tested on gdm and kdm.

Problem 2.

Wifi automaticaly turned "ON" when Ubuntu start.
It always turned "ON".

Ubuntu 7.10 have not this problems.
Resolved problems in 8.04: My notebooks Fn-keys work!

April 25th, 2008, 05:32 PM
ok found a solution for u guys using ASUS M50sv laptop.

The problem seems to be with the lihght sensor, which doesn't work properly.

First of all, take a torchlight and point it to the sensor (right to the right of the "ALTEC LANSING" writing on the top of your keyboard) and... voila! lights up!

Ok, here's the fix:

$sudo su
#echo 0 > /sys/devices/platform/asus_laptop/ls_switch

This will put a 0 in the ls_switch file, telling your laptop to NOT use the light sensor, which will give you the control of your brightness back.

Hope it helps!

Taken from: http://vip.asus.com/forum/view.aspx?board_id=3&model=M50Sr&id=20080411154124718&page=1&SLanguage=en-us

November 3rd, 2008, 10:36 AM
Extremely usefull! My eyes thank you a lot :)!