Additional info:
reporter:       libreport-2.2.2
WARNING: CPU: 1 PID: 2201 at drivers/gpu/drm/i915/intel_uncore.c:126 gen6_gt_check_fifodbg.isra.10+0x3d/0x50 [i915]()
GT wake FIFO error 0x3
Modules linked in: usb_storage nfnetlink_queue nfnetlink_log nfnetlink vhost_net vhost macvtap macvlan joydev fuse ipt_MASQUERADE xt_CHECKSUM tun ccm ip6t_rpfilter ip6t_REJECT xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw arc4 uvcvideo iwldvm btusb mac80211 iTCO_wdt iTCO_vendor_support videobuf2_vmalloc x86_pkg_temp_thermal coretemp videobuf2_memops kvm_intel kvm snd_hda_codec_hdmi snd_hda_codec_conexant snd_hda_codec_generic microcode videobuf2_core videodev snd_hda_intel snd_hda_codec media bluetooth iwlwifi snd_hwdep sdhci_pci snd_seq snd_seq_device 6lowpan_iphc sdhci snd_pcm serio_raw cfg80211 mmc_core mei_me lpc_ich i2c_i801 mfd_core thinkpad_acpi shpchp snd_timer mei wmi snd soundcore rfkill tpm_tis tpm binfmt_misc dm_crypt crct10dif_pclmul crc32_pclmul crc32c_intel i915 ghash_clmulni_intel i2c_algo_bit drm_kms_helper e1000e drm ptp pps_core i2c_core video
CPU: 1 PID: 2201 Comm: Xorg Not tainted 3.14.4-200.fc20.x86_64 #1
Hardware name: LENOVO 4174BH4/4174BH4, BIOS 8CET51WW (1.31 ) 11/29/2011
 0000000000000000 0000000078f5d2fe ffff8800cfabdaf8 ffffffff816ef1d2
 ffff8800cfabdb40 ffff8800cfabdb30 ffffffff8108a1bd 0000000000000003
 ffff88020fd40020 0000000000000000 ffff88020fd40028 0000000000000001
Call Trace:
 [<ffffffff816ef1d2>] dump_stack+0x45/0x56
 [<ffffffff8108a1bd>] warn_slowpath_common+0x7d/0xa0
 [<ffffffff8108a23c>] warn_slowpath_fmt+0x5c/0x80
 [<ffffffffa01581dd>] gen6_gt_check_fifodbg.isra.10+0x3d/0x50 [i915]
 [<ffffffffa0158218>] __gen6_gt_force_wake_put+0x28/0x30 [i915]
 [<ffffffffa015984d>] gen6_read32+0x9d/0x110 [i915]
 [<ffffffffa014fd44>] intel_ring_get_active_head+0x34/0x40 [i915]
 [<ffffffffa014fd67>] gen6_ring_get_seqno+0x17/0x30 [i915]
 [<ffffffffa00fb106>] __wait_seqno+0x1e6/0x4f0 [i915]
 [<ffffffff810b0e25>] ? enqueue_hrtimer+0x25/0x80
 [<ffffffff810d20e0>] ? abort_exclusive_wait+0xb0/0xb0
 [<ffffffffa0102bdc>] i915_gem_set_domain_ioctl+0x16c/0x250 [i915]
 [<ffffffffa0029bf2>] drm_ioctl+0x4f2/0x620 [drm]
 [<ffffffff8109d5ac>] ? signal_setup_done+0x3c/0x60
 [<ffffffff810145d5>] ? do_signal+0x1b5/0x640
 [<ffffffff8101fd4a>] ? __restore_xstate_sig+0x9a/0x550
 [<ffffffff811fcc30>] do_vfs_ioctl+0x2e0/0x4a0
 [<ffffffff811fce71>] SyS_ioctl+0x81/0xa0
 [<ffffffff816ff807>] ? int_check_syscall_exit_work+0x34/0x3d
 [<ffffffff816ff569>] system_call_fastpath+0x16/0x1b