Intermittent Intel GPU Lockup: intel_crtc_wait_for_pending_flips

Sometimes when playing a video (VLC) or browsing in chromium, the display stops updating except for the mouse pointer. Audio playback will continue. I can press ctrl-alt-F1 to get to another VT (though there is a delay of ~10 seconds before this occurs) and then switch back and things seem fine. I see this in the syslog after it's occurred:

Jan 21 21:52:33 sydney kernel: [365284.305075] CPU: 7 PID: 1567 Comm: Xorg Tainted: G W 3.16.0-29-generic #39-Ubuntu
Jan 21 21:52:33 sydney kernel: [365284.305077] Hardware name: Dell Inc. OptiPlex 9010/051FJ8, BIOS A19 08/18/2014
Jan 21 21:52:33 sydney kernel: [365284.305079] 0000000000000009 ffff8803f9cebbf8 ffffffff8278218a 0000000000000000
Jan 21 21:52:33 sydney kernel: [365284.305083] ffff8803f9cebc30 ffffffff8206fedd 0000000000000000 ffff8804039fc000
Jan 21 21:52:33 sydney kernel: [365284.305086] ffff880403788210 ffff880403ae6000 ffff880403ae6000 ffff8803f9cebc40
Jan 21 21:52:33 sydney kernel: [365284.305089] Call Trace:
Jan 21 21:52:33 sydney kernel: [365284.305097] [<ffffffff8278218a>] dump_stack+0x45/0x56
Jan 21 21:52:33 sydney kernel: [365284.305102] [<ffffffff8206fedd>] warn_slowpath_common+0x7d/0xa0
Jan 21 21:52:33 sydney kernel: [365284.305106] [<ffffffff8206ffba>] warn_slowpath_null+0x1a/0x20
Jan 21 21:52:33 sydney kernel: [365284.305129] [<ffffffffc061608c>] intel_crtc_wait_for_pending_flips+0x16c/0x180 [i915]
Jan 21 21:52:33 sydney kernel: [365284.305134] [<ffffffff820b9730>] ? prepare_to_wait_event+0x100/0x100
Jan 21 21:52:33 sydney kernel: [365284.305155] [<ffffffffc0618b53>] intel_crtc_disable_planes+0x33/0x1c0 [i915]
Jan 21 21:52:33 sydney kernel: [365284.305174] [<ffffffffc0619120>] ironlake_crtc_disable+0x50/0x980 [i915]
Jan 21 21:52:33 sydney kernel: [365284.305193] [<ffffffffc0559f53>] ? drm_modeset_lock+0x33/0xf0 [drm]
Jan 21 21:52:33 sydney kernel: [365284.305197] [<ffffffff82787f72>] ? mutex_lock+0x12/0x30
Jan 21 21:52:33 sydney kernel: [365284.305217] [<ffffffffc061a4e7>] intel_crtc_update_dpms+0x67/0xa0 [i915]
Jan 21 21:52:33 sydney kernel: [365284.305237] [<ffffffffc061eb59>] intel_connector_dpms+0x59/0x70 [i915]
Jan 21 21:52:33 sydney kernel: [365284.305253] [<ffffffffc0550e19>] drm_mode_obj_set_property_ioctl+0x399/0x3a0 [drm]
Jan 21 21:52:33 sydney kernel: [365284.305267] [<ffffffffc0550e50>] drm_mode_connector_property_set_ioctl+0x30/0x40 [drm]
Jan 21 21:52:33 sydney kernel: [365284.305278] [<ffffffffc053fa4f>] drm_ioctl+0x1df/0x680 [drm]
Jan 21 21:52:33 sydney kernel: [365284.305284] [<ffffffff8222009c>] ? fsnotify+0x27c/0x350
Jan 21 21:52:33 sydney kernel: [365284.305287] [<ffffffff8222009c>] ? fsnotify+0x27c/0x350
Jan 21 21:52:33 sydney kernel: [365284.305291] [<ffffffff821f5208>] do_vfs_ioctl+0x2c8/0x4a0
Jan 21 21:52:33 sydney kernel: [365284.305295] [<ffffffff821e3701>] ? __sb_end_write+0x31/0x60
Jan 21 21:52:33 sydney kernel: [365284.305299] [<ffffffff821e1272>] ? vfs_write+0x1b2/0x1f0
Jan 21 21:52:33 sydney kernel: [365284.305302] [<ffffffff821f5461>] SyS_ioctl+0x81/0xa0
Jan 21 21:52:33 sydney kernel: [365284.305306] [<ffffffff8278a1ad>] system_call_fastpath+0x1a/0x1f
Jan 21 21:52:33 sydney kernel: [365284.305309] ---[ end trace 491ebdb18d4be6c4 ]---

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: libgl1-mesa-dri 10.3.2-0ubuntu0.1
ProcVersionSignature: Ubuntu 3.16.0-29.39-generic 3.16.7-ckt2
Uname: Linux 3.16.0-29-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.14.7-0ubuntu8.1
Architecture: amd64
CompizPlugins: [core,composite,opengl,decor,move,place,grid,mousepoll,session,snap,vpswitch,wall,neg,obs,compiztoolbox,regex,imgpng,resize,gnomecompat,animation,expo,ezoom,workarounds,unitymtgrabhandles,screenshot,fade,scale,unityshell]
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Wed Jan 21 21:55:30 2015
DistUpgraded: Fresh install
DistroCodename: utopic
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
 Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor Graphics Controller [8086:0162] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Dell Device [1028:052c]
InstallationDate: Installed on 2014-11-29 (53 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
MachineType: Dell Inc. OptiPlex 9010
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-3.16.0-29-generic.efi.signed root=UUID=3a6b7e94-440c-4aaf-adea-643f6518b8cf ro rootflags=subvol=@ quiet splash vt.handoff=7
SourcePackage: mesa
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/18/2014
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A19
dmi.board.name: 051FJ8
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 15
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA19:bd08/18/2014:svnDellInc.:pnOptiPlex9010:pvr01:rvnDellInc.:rn051FJ8:rvrA00:cvnDellInc.:ct15:cvr:
dmi.product.name: OptiPlex 9010
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.12+14.10.20140918-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.56-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.3.2-0ubuntu0.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.3.2-0ubuntu0.1
version.xserver-xorg-core: xserver-xorg-core 2:1.16.0-1ubuntu1.2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.9.0-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.4.0-2ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.914-1~exp1ubuntu4.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.11-1ubuntu2
xserver.bootTime: Sat Jan 17 16:27:15 2015
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 16485
 vendor DEL
xserver.version: 2:1.16.0-1ubuntu1.2