Comment 92 for bug 1384342

I experience this at least once per day on a Ubuntu 14.04-installation with LTS hardware enablement upgrade to kernel 3.16 (and newer Xorg components). Typically, full screen video playback will suddenly freeze (audio continues to play). At that point I must switch to VT 1, which takes about a minute to happen, and then back to VT 7, to unfreeze the desktop. The error in the kernel log does not appear immediately, but rather after having switched to VT 1 (intel_crtc_wait_for_pending_flips+0x171/0x180). Typically, the app that was playing video will crash.

System (Shuttle-based HTPC) uses an Intel(R) Core(TM) i3-3225 CPU and integrated graphics:
00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller (rev 09)

Happened with all 3.16 kernel releases up to 3.16.0-34-generic so far.