https://bugs.freedesktop.org/show_bug.cgi?id=42960 --- Comment #8 from leon_ti@mail.ru --- I can confirm similar behaviour for A6 "ARUBA" APU without any discrete GPU, at Samsubg NP535U3C laptop. leon_ti@leonid-samsung:~$ uname -a Linux leonid-samsung 3.12.0-031200-generic #201311031935 SMP Mon Nov 4 00:36:54 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux -- You are receiving this mail because: You are the assignee for the bug.