Bug#701216: same problem here

[Laurent Lesage]

.. using same soft version (debian 7.0) and  similar graphic card

00:02.0 VGA compatible controller: Intel Corporation Mobile 945GSE 
Express Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 
943/940GML Express Integrated Graphics Controller (rev 03)

same things happen :
-no problem with "gnome classic" or with integrated screen. But using 
external screen (1920*1080), as soon as I have more than 3/4 windows, 
gnome-shell crashes with that message (intel_do_flush_locked failed: No 
space on device)

happens randomly but quite often.

Laurent Lesage