Link to current progress which has been little unfortunately. http://www.kubuntuforums.net/showthread.php?60891-Weird-Composition-error&p=314029 I am having a weird artifact and screen tearing issue. It is a very eratic issues as sometimes it is not there and other times is it every where. It happens a lot on right click menus.
lspci -nnk | grep -iA2 vga 00:02.0 VGA compatible controller : Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) Subsystem: Dell Device [1028:0551] Kernel driver in use: i915 -- 01:00.0 VGA compatible controller : NVIDIA Corporation Device [10de:11a0] (rev ff) 07:00.0 Ethernet controller : Atheros Communications Inc. AR8151 v2.0 Gigabit Ethernet [1969:1083] (rev c0) Subsystem: Dell Device [1028:057b]