Additional info:
reporter:       libreport-2.3.0
WARNING: CPU: 0 PID: 951 at drivers/gpu/drm/i915/intel_display.c:3361 intel_crtc_wait_for_pending_flips+0x1a5/0x1b0 [i915]()
Modules linked in: tun tcp_lp rfcomm fuse xt_addrtype ipt_MASQUERADE ccm dm_thin_pool dm_persistent_data dm_bio_prison libcrc32c loop 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 dm_crypt coretemp kvm_intel uvcvideo videobuf2_vmalloc videobuf2_memops kvm videobuf2_core v4l2_common ppdev arc4 videodev iwldvm mxm_wmi crct10dif_pclmul iTCO_wdt iTCO_vendor_support crc32_pclmul crc32c_intel ghash_clmulni_intel mac80211 media microcode sdhci_pci sdhci mmc_core btusb joydev bluetooth
 serio_raw iwlwifi parport_pc snd_hda_codec_hdmi parport cfg80211 intel_ips wmi shpchp snd_hda_codec_conexant snd_hda_codec_generic i2c_i801 snd_hda_intel snd_hda_controller thinkpad_acpi mei_me lpc_ich mei mfd_core snd_hda_codec snd_hwdep snd_pcm snd_timer snd tpm_tis tpm rfkill soundcore binfmt_misc i915 firewire_ohci firewire_core crc_itu_t i2c_algo_bit e1000e drm_kms_helper drm ptp pps_core video
CPU: 0 PID: 951 Comm: Xorg Not tainted 3.17.8-200.fc20.x86_64 #1
Hardware name: LENOVO 2537CS5/2537CS5, BIOS 6IET75WW (1.35 ) 02/01/2011
 0000000000000000 00000000c20f03c0 ffff88022ebab908 ffffffff81728f6c
 0000000000000000 ffff88022ebab940 ffffffff81092e7d 0000000000000000
 ffff88022fe32000 ffff8800369482c0 ffff880036a7c800 ffff880036a7cb60
Call Trace:
 [<ffffffff81728f6c>] dump_stack+0x45/0x56
 [<ffffffff81092e7d>] warn_slowpath_common+0x7d/0xa0
 [<ffffffff81092faa>] warn_slowpath_null+0x1a/0x20
 [<ffffffffa01497b5>] intel_crtc_wait_for_pending_flips+0x1a5/0x1b0 [i915]
 [<ffffffff810d1880>] ? prepare_to_wait_event+0xf0/0xf0
 [<ffffffffa01550a8>] intel_crtc_set_config+0x9a8/0xe60 [i915]
 [<ffffffffa0031584>] drm_mode_set_config_internal+0x64/0xf0 [drm]
 [<ffffffffa008ac13>] restore_fbdev_mode+0xb3/0xe0 [drm_kms_helper]
 [<ffffffffa008ac63>] drm_fb_helper_restore_fbdev_mode_unlocked+0x23/0x40 [drm_kms_helper]
 [<ffffffffa008c878>] drm_fb_helper_set_par+0x28/0x70 [drm_kms_helper]
 [<ffffffffa015fdaa>] intel_fbdev_set_par+0x1a/0x60 [i915]
 [<ffffffff813e0bb6>] ? fb_set_var+0x206/0x440
 [<ffffffff813e0b47>] fb_set_var+0x197/0x440
 [<ffffffff810c8c57>] ? enqueue_entity+0x237/0x8c0
 [<ffffffff810c7cca>] ? check_preempt_wakeup+0x12a/0x220
 [<ffffffff810c6be7>] ? update_curr+0x67/0x160
 [<ffffffff813d74e1>] fbcon_blank+0x1f1/0x2f0
 [<ffffffff814581f8>] do_unblank_screen+0xb8/0x1f0
 [<ffffffff8144e06a>] complete_change_console+0x5a/0xe0
 [<ffffffff8144f0c5>] vt_ioctl+0xfd5/0x1190
 [<ffffffffa0027cac>] ? drm_ioctl+0x8c/0x660 [drm]
 [<ffffffff81442c69>] tty_ioctl+0x289/0xb70
 [<ffffffff8123eaa8>] ? fsnotify+0x238/0x310
 [<ffffffff812136b0>] do_vfs_ioctl+0x2e0/0x4a0
 [<ffffffff81202bb1>] ? __sb_end_write+0x31/0x60
 [<ffffffff812138f1>] SyS_ioctl+0x81/0xa0
 [<ffffffff8112f5d6>] ? __audit_syscall_exit+0x1f6/0x2a0
 [<ffffffff81730629>] system_call_fastpath+0x16/0x1b