[Bug 140782] Re: Inspiron 1420 LCD brightness keys broken

Javier Mena javimena at gmail.com
Tue Oct 23 06:40:07 UTC 2007

The brightness keys in my vostro 1000 and Ubuntu 7.10 are completely
dead. Before upgrading they keys behaviour was vey weird.

I still don't know where is the problem, and I don't have any solution.

I just can change the brightness manually using (*without* blacklisting
video module). At least is a temporary solution to me:

First, view all the possible levels in LCD brightness file:

cat /proc/acpi/video/VGA/LCD/brightness

choose one, say X level (for example 75), and
echo 75 | sudo dd of=/proc/acpi/video/VGA/LCD/brightness

Adding the option 'no_automatic_changes=0' doesn't works completely for
me. It just let me push the brightness down (Fn+UP doesn't works) and
only using a pure terminal (i.e. CTRL+ALT+F1).

The "brightness miniapplication" (I don't know the exact name in english) doesn't works. The gnome-power-manager doesn't shows me any option to adjust the brightness.

BIOS: 2.6.1

Inspiron 1420 LCD brightness keys broken
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