Comment 23 for bug 425773

The first point is easily solved by attaching an Xorg.0.log, dmesg from after the slow down. That will confirm whether or not is an application or driver bug. Following that, profiling the system when the launcher show abnormally high loads will tell us where to look for the bug and probable fix - however, since this i915 which is not very capable hardware the the OpenGL driver is abysmal it is likely to be using software rasterisation instead of hardware acceleration. (With a semi-decent driver this would not even be an issue, but alas, you choose to use OpenGL.)