Comment 21 for bug 836023

Still suffering from this with this video drivers:

OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Ivybridge Mobile
OpenGL version string: 3.0 Mesa 9.1-devel

My workaround:

I think this issue is most likely related with blur. On ccsm , Ubuntu Unity plugin, I have set "Dash blur" to "None" in tab General, and the problem went away. I noticed Unity's launcher (which was slow like alt-tab) is now fast. Probably not the best solution but definitely a good workaround and I honestly don't notice the blur at all.