[Solved] screen brightness too low after reboot

xiaweitang · 2010-01-08 09:06:54

Every time after I reboot, the screen brightness is set to something half of the full value.

Last edited by xiaweitang (2010-01-17 21:27:19)

Roline · 2010-01-08 09:29:12

What DE/WM are you using?

xiaweitang · 2010-01-08 17:33:18

Roline wrote:

What DE/WM are you using?

xmonad

guzz46 · 2010-01-08 18:55:07

Have a look for a brightness text file in (my laptop is an acer so i have) /sys/class/backlight/acer-wmi/brightness and see what it reads, i think max should be 9

Then as root try (for me it would be) echo 9 > /sys/class/backlight/acer-wmi/brightness and if that works put that command in /etc/rc.local

xiaweitang · 2010-01-08 19:11:19

guzz46 wrote:

Have a look for a brightness text file in (my laptop is an acer so i have) /sys/class/backlight/acer-wmi/brightness and see what it reads, i think max should be 9
Then as root try (for me it would be) echo 9 > /sys/class/backlight/acer-wmi/brightness and if that works put that command in /etc/rc.local

My /sys/class/backlight/ only contains a folder acpi_video0 which is linked from /sys/devices/virtual/backlight/acpi_video0, which contains files named "actual_brightness", brightness", "max_brightness" and others. The first file contains a single number 7, the second 0, the third 7. I don't know which to change.

guzz46 · 2010-01-08 19:47:25

Try echo 7 > /sys/class/backlight/acpi_video0/brightness

Arch Linux

#1 2010-01-08 09:06:54

[Solved] screen brightness too low after reboot

#2 2010-01-08 09:29:12

Re: [Solved] screen brightness too low after reboot

#3 2010-01-08 17:33:18

Re: [Solved] screen brightness too low after reboot

#4 2010-01-08 18:55:07

Re: [Solved] screen brightness too low after reboot

#5 2010-01-08 19:11:19

Re: [Solved] screen brightness too low after reboot

#6 2010-01-08 19:47:25

Re: [Solved] screen brightness too low after reboot

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