Comment 10 for bug 1386721

My understanding is that the problem doesn't necessarily lie in Intel graphics driver, if that would be the case, sluggish performance would affect desktop as a whole, regardless of applications currently running. At the moment, my 14.10 Gnome desktop is perfectly smooth until I launch certain applications like Google Chrome or Image Viewer. Gedit also caused this issue until I upgraded it to 3.12.2 from gnome3-team's ppa - now runs without a hitch. That makes me think that these applications are rendered using different library/method which is not accelerated by graphics driver - that's how in laymans words I would describe my understanding of the case.

I have also reported #1385764 which has been marked as duplicated of this bug, where I explained the issue further.