https://bugs.freedesktop.org/show_bug.cgi?id=75649 --- Comment #6 from Paul Bodenbenner --- I get the same problems as described before with two different monitors. Using an up-to-date Arch Linux with kernel 3.14 (also tried kernel 3.15rc2) with a hd3470 card. Problem occurs only, if an external monitor is connected at resolution 1920x1080@60Hz in single mode (extended mode makes no problems). Funny enough when using 1920x1080@50Hz in single mode everything seems also fine. By switching back to Catalyst the problem doesn't occur. Found some similar threads: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1209315 https://bugs.freedesktop.org/show_bug.cgi?id=42621 By disabling color tiling and dpm the phenomenon appears only when switching between modes (monitors on / off). So in this case when starting the laptop with closed lid everything is ok, until switching between modes. -- You are receiving this mail because: You are the assignee for the bug.