Ubuntu
linux package

  1. Bug #1007765
  2. Comment #86

Comment 86 for bug 1007765

Revision history for this message
Julian Neil (julian-neil) wrote :

I still have this problem with 3.8.0-19-generic #30-Ubuntu SMP Wed May 1 16:35:23 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
 with intel graphics HD4000.

When I first boot, changing brightness is fine. But after a period of time, it will hang if I adjust the brightness.

Similarly, when I first boot I can logout and power down my laptop without issues, but after a time, if I attempt to log out or shutdown it hangs. I suspect these hangs are both related.

Adding 'acpi_backlight=vendor' to the kernel parameters didn't make much of a difference for me.