Comment 0 for bug 1385764

After upgrading to Ubuntu Gnome 14.10 I have noticed desktop performance degradation when certain applications are running. By "performance degradation" I mean smoothness of usual animated activities like switching workspaces, opening overview (left super-key) etc. These animations are perfectly smooth until certain applications are executed and visible on the desktop, then animations are lagging and stuttering. However, once the "bogus" application is closed - animations are all fine again.

Two example applications that I have determined to cause this issue are:
- Google Chrome, ver. 38.0.2125.104 (Official Build 290379)
- Image Viewer ver. 3.12.2

Additionally, Image Viewer itself is extremely laggy, ie. clicking on menu items, loading next/prev images, opening/closing full-screen view... all of these activities are very slow and are barely usable. Using Google Chrome, however, is relatively smooth.

Interesting and potentially useful observation I made was that shortly after upgrading to 14.10 I've noticed that gedit has been left in version 3.10.4 (with "old" UI) and was presenting exactly same kind of laggy behaviour as Image Viewer. Once I've upgraded gedit to 3.12.2 (with new UI), it's working all fine again.

I have also recorded a screencast demonstrating this issue:
https://www.youtube.com/watch?v=0LhKhdgKHiQ

Few closing notes:
- my hardware is Dell XPS13 with Intel® Core™ i7-3537U CPU @ 2.00GHz × 4 + Intel® Ivybridge Mobile graphics
- I have upgraded from 14.04 to 14.10 using standard Software Updater GUI
- I have googled around and tried to tackle the problem by tweaking graphics driver (AccelMethod sna/uxa, TearFree true etc etc.) - no luck whatsoever
- I have posted this issue in Ubuntu Gnome Google+ Community and it appears that more users are affected by the same issue