Ubuntu
linux package

  1. Bug #1214148
  2. Comment #29

Comment 29 for bug 1214148

Revision history for this message
Alan Pater (alan-pater) wrote :

Symptom sometimes occurs on a R700 Toshiba when returning from sleep mode. Restarting the system restores this functionality.

I am running Ubuntu 14.04 64 bit.
~$ uname -psrv
Linux 3.13.0-29-generic #53-Ubuntu SMP Wed Jun 4 21:00:20 UTC 2014 x86_64

I could also adjust the brightness from the terminal:

~$ cat /sys/class/backlight/intel_backlight/brightness
1030

~$ grep . /sys/class/backlight/intel_backlight/*
/sys/class/backlight/intel_backlight/actual_brightness:1030
/sys/class/backlight/intel_backlight/bl_power:0
/sys/class/backlight/intel_backlight/brightness:1030
/sys/class/backlight/intel_backlight/max_brightness:4539

So, to temporarily increase the screen brightness:

~$ echo 3030 | sudo tee /sys/class/backlight/intel_backlight/brightness
3030