Directory
-rw-r--r-- 1 root root 0 2011-03-12 22:51 brightness
-r--r--r-- 1 root root 0 2011-03-12 22:51 EDID
-r--r--r-- 1 root root 0 2011-03-12 22:51 info
-rw-r--r-- 1 root root 0 2011-03-12 22:51 state
nishant@thegladiator:/proc/acpi/video/OVGA/LCD$ cat brightness 
<not supported>
nishant@thegladiator:/proc/acpi/video/OVGA/LCD$ cat *
<not supported>
<not supported>
device_id:    0x0400
type:         UNKNOWN
known by bios: no
state:     0x1d


nishant@thegladiator:/proc/acpi/video/OVGA/LCD$ echo 100 | sudo tee /proc/acpi/video/OVGA/LCD/brightness
[sudo] password for nishant: 
100
tee: /proc/acpi/video/OVGA/LCD/brightness: Invalid argument
nishant@thegladiator:/proc/acpi/video/OVGA/LCD$