Comment 3 for bug 1435115

As Cameron Norman requested, I'm posting here my system output:

filipeserras@X53S:~$ sudo cat /var/log/upstart/brightness-*.log
Using fallback value: 7
Using saved value: 15
Using saved value: 15
Using saved value: 15
Using saved value: 15
Using saved value: 15
Using fallback value: 127
Using saved value: 127
Using saved value: 127
Using saved value: 127
Using saved value: 127
Using saved value: 127

filipeserras@X53S:~$ ls -1 /sys/class/backlight
acpi_video0
radeon_bl0

filipeserras@X53S:~$ cat /sys/class/backlight/*/brightness
15
0

filipeserras@X53S:~$ cat /sys/class/backlight/*/max_brightness
15
255

ls -1 /var/lib/backlight
acpi_video0
radeon_bl0

filipeserras@X53S:~$ cat /var/lib/backlight/*/brightness
15
127

Kernel 3.13.0-32 - ATI Radeon Mobility HD 2400 using Open-Source Drivers.

On Kernel 3.13.0-46 only one output differs:

filipeserras@X53S:~$ cat /sys/class/backlight/*/brightness
15
255

I still haven't got the time to test the ISO's with Kernel 3.16 as Cody mentioned. If I get to test it I'll post the outputs here.