i915 errorastic spasms

WARNING: at /home/apw/COD/linux/drivers/gpu/drm/i915/intel_pm.c:4355 gen6_gt_check_fifodbg+0x41/0x60 [i915]()
[130074.544313] Hardware name: To Be Filled By O.E.M.
[130074.544314] MMIO read or write has been dropped 2
[130074.544315] Modules linked in: xt_REDIRECT ip6table_filter ip6_tables xt_multiport zram(C) ipt_MASQUERADE xt_state ipt_REJECT xt_tcpudp iptable_filter nf_nat_h323 nf_conntrack_h323 nf_nat_pptp nf_conntrack_pptp nf_conntrack_proto_gre nf_nat_proto_gre nf_nat_tftp nf_conntrack_tftp nf_nat_sip nf_conntrack_sip nf_nat_irc nf_conntrack_irc nf_nat_ftp nf_conntrack_ftp iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack ip_tables x_tables nfsv4 sit tunnel4 intel_powerclamp kvm_intel kvm crc32_pclmul ghash_clmulni_intel aesni_intel ablk_helper cryptd lrw aes_x86_64 xts gf128mul mxm_wmi snd_hda_codec_hdmi snd_hda_codec_realtek microcode dm_multipath scsi_dh ftdi_sio joydev usbserial snd_usb_audio snd_usbmidi_lib psmouse serio_raw lpc_ich snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer i915 snd_seq_device snd bnep rfcomm bluetooth drm_kms_helper parport_pc drm i2c_algo_bit ppdev wmi soundcore video snd_page_alloc mac_hid nfsd nfs_acl w83627ehf auth_rpcgss hwmon_vid coretemp nfs fscache lp lockd parport sunrpc binfmt_misc tcp_illinois hid_generic btrfs zlib_deflate libcrc32c raid10 raid456 async_pq async_xor hid_logitech xor ff_memless async_memcpy async_raid6_recov usbhid hid firewire_ohci firewire_core pata_via pata_acpi crc_itu_t r8169 e1000e ahci libahci ptp pps_core mvsas raid6_pq libsas async_tx scsi_transport_sas raid1 raid0 multipath linear dm_mirror dm_region_hash dm_log
[130074.544369] Pid: 3863, comm: kworker/u:0 Tainted: G        WC   3.9.8-030908-generic #201306271518
[130074.544370] Call Trace:
[130074.544373]  [<ffffffff8104513f>] warn_slowpath_common+0x7f/0xc0
[130074.544375]  [<ffffffff81045236>] warn_slowpath_fmt+0x46/0x50
[130074.544386]  [<ffffffffa04e9251>] gen6_gt_check_fifodbg+0x41/0x60 [i915]
[130074.544394]  [<ffffffffa049b7f4>] i915_write32+0x1d4/0x1e0 [i915]
[130074.544403]  [<ffffffffa04b6a8b>] i915_gem_init_ppgtt+0xfb/0x1d0 [i915]
[130074.544411]  [<ffffffffa049bc67>] i915_reset+0x107/0x190 [i915]
[130074.544419]  [<ffffffffa04a1b5d>] i915_error_work_func+0xcd/0x150 [i915]
[130074.544423]  [<ffffffff8106390d>] process_one_work+0x16d/0x3e0
[130074.544426]  [<ffffffff81065388>] worker_thread+0x118/0x330
[130074.544428]  [<ffffffff81065270>] ? manage_workers+0x120/0x120
[130074.544430]  [<ffffffff8106a830>] kthread+0xc0/0xd0
[130074.544432]  [<ffffffff8106a770>] ? flush_kthread_work+0x130/0x130
[130074.544434]  [<ffffffff816e18dc>] ret_from_fork+0x7c/0xb0
[130074.544436]  [<ffffffff8106a770>] ? flush_kthread_work+0x130/0x130
[130074.544438] ---[ end trace 06a18a146876afd1 ]---
[130083.215524] [drm:i915_hangcheck_hung] *ERROR* Hangcheck timer elapsed... GPU hung
[130083.215581] ------------[ cut here ]------------