Ubuntu
linux-lts-trusty package

  1. Bug #1255014
  2. Comment #10

Comment 10 for bug 1255014

Revision history for this message
Alex Hung (alexhung) wrote :

It seems the _BCM is broken (_BCM is called when writing to /sys/class/backlight/acpi_video0/brightness).

We will need BIOS to fix it (if it is still possible).