Low max brightness on eee pc T101MT

[h2z]

I've just recently installed Lubuntu 12.10 on my Asus eee PC T101MT laptop and the max brightness is only about 50% of what I get from windows. The VGA device on this laptop is the Intel GMA 3150. I installed the mesa drivers.

I can change the brightness using the FN key on my keyboard, and by installing xbacklight. I have tried xrandr but could not figure out what "crtc" is and how to use that.

Is there any way to get the REAL max brightness?

[Malexan]

I found solution here: https://wiki.archlinux.org/index.php...1MT#Brightness

[Rock Storm]

I've just recently installed Lubuntu 12.10 on my Asus eee PC T101MT laptop and the max brightness is only about 50% of what I get from windows. The VGA device on this laptop is the Intel GMA 3150. I installed the mesa drivers.

I can change the brightness using the FN key on my keyboard, and by installing xbacklight. I have tried xrandr but could not figure out what "crtc" is and how to use that.

I had exactly the same problem on an Asus EeePC 1015CX after installing Lubuntu 12.10.

I must say I haven't tried the solution given by Malexan, you should probably try that one first:

I found solution here: https://wiki.archlinux.org/index.php...1MT#Brightness

What worked for me was this (please don't forget to read the additional notes below):

Edit the file named "brightness" in /sys/class/backlight/psb-bl, where it said 0, just write e.g. 50. In order to modify this kind of files you need to be root, so open a terminal (Accesories -> LXTerminal) and proceed as follows:

cd /sys/class/backlight/psb-bl
sudo leafpad brightness

To make this change permanent you must edit the file "rc.local" in /etc. Just like this:

cd /etc
sudo leafpad rc.local

Where it says:

exit 0

Rewrite to (again, instead of 50 you can type any number between 0 and 100):

echo 50 > /sys/class/backlight/psb-bl/brightness
exit 0

Additional notes:

• If you don't see (or don't even have) the folder "psb-bl" or the above explained doesn't work, there is another "brightness" file in /sys/class/backlight/acpi_video0.
• Some authors suggest to comment out the "exit 0" (This would be, adding a # before it) Works likewise.