Description of problem:
Left computer for a bit. Came back and it was unresponsive. Waited 6 minutes and it came back to life and threw this error.

Additional info:
reporter:       libreport-2.3.0
WARNING: CPU: 0 PID: 1149 at drivers/gpu/drm/i915/intel_display.c:3361 intel_crtc_wait_for_pending_flips+0x1a1/0x1b0 [i915]()
Modules linked in: ccm fuse xt_CHECKSUM ipt_MASQUERADE tun nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_ftp 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 bnep ppdev iTCO_wdt mxm_wmi iTCO_vendor_support snd_hda_codec_hdmi snd_hda_codec_conexant snd_hda_codec_generic uvcvideo snd_hda_intel arc4 videobuf2_vmalloc snd_hda_controller videobuf2_memops videobuf2_core iwldvm snd_hda_codec coretemp mac80211 kvm_intel kvm v4l2_common videodev snd_hwdep snd_seq btusb joydev
 media iwlwifi intel_ips serio_raw i2c_i801 snd_seq_device bluetooth cfg80211 snd_pcm sdhci_pci sdhci thinkpad_acpi mmc_core snd_timer tpm_tis snd tpm rfkill parport_pc parport soundcore mei_me wmi mei shpchp lpc_ich mfd_core acpi_cpufreq binfmt_misc dm_crypt btrfs xor raid6_pq i915 crct10dif_pclmul i2c_algo_bit crc32_pclmul drm_kms_helper e1000e crc32c_intel firewire_ohci drm ghash_clmulni_intel firewire_core crc_itu_t ptp pps_core video loop
CPU: 0 PID: 1149 Comm: Xorg.bin Not tainted 3.17.6-300.fc21.x86_64 #1
Hardware name: LENOVO 2522BQ9/2522BQ9, BIOS 6IET85WW (1.45 ) 02/14/2013
 0000000000000000 000000009e1ebd2d ffff880220babc28 ffffffff8173f8aa
 0000000000000000 ffff880220babc60 ffffffff810970bd 0000000000000000
 ffff8800364782c0 ffff880230393000 ffff88022dbb1800 ffff88022dbb1800
Call Trace:
 [<ffffffff8173f8aa>] dump_stack+0x45/0x56
 [<ffffffff810970bd>] warn_slowpath_common+0x7d/0xa0
 [<ffffffff810971ea>] warn_slowpath_null+0x1a/0x20
 [<ffffffffa01894d1>] intel_crtc_wait_for_pending_flips+0x1a1/0x1b0 [i915]
 [<ffffffff810d6e90>] ? abort_exclusive_wait+0xb0/0xb0
 [<ffffffffa0189588>] intel_primary_plane_disable+0xa8/0xe0 [i915]
 [<ffffffffa005bc82>] setplane_internal+0x192/0x2b0 [drm]
 [<ffffffffa005a019>] ? _object_find+0x69/0xa0 [drm]
 [<ffffffffa005ee05>] drm_mode_setplane+0x145/0x1e0 [drm]
 [<ffffffffa0050e6f>] drm_ioctl+0x1df/0x680 [drm]
 [<ffffffff8124c87c>] ? fsnotify+0x28c/0x370
 [<ffffffff81220910>] do_vfs_ioctl+0x2d0/0x4b0
 [<ffffffff81220b71>] SyS_ioctl+0x81/0xa0
 [<ffffffff81135d96>] ? __audit_syscall_exit+0x1f6/0x2a0
 [<ffffffff81746a69>] system_call_fastpath+0x16/0x1b