Description of problem:
Occurred at boot up.

Additional info:
reporter:       libreport-2.2.3
WARNING: CPU: 1 PID: 910 at drivers/gpu/drm/i915/intel_display.c:861 intel_wait_for_vblank+0x209/0x210 [i915]()
vblank wait timed out
------------[ cut here ]------------
WARNING: CPU: 1 PID: 910 at drivers/gpu/drm/i915/intel_display.c:861 intel_wait_for_vblank+0x209/0x210 [i915]()
vblank wait timed out
Modules linked in: bnep bluetooth 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 fuse arc4 snd_hda_codec_hdmi ath5k ath uvcvideo snd_hda_codec_realtek snd_hda_codec_generic mac80211 cfg80211 videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev media snd_hda_intel iTCO_wdt coretemp iTCO_vendor_support snd_hda_controller snd_hda_codec shpchp lpc_ich i2c_i801 snd_hwdep snd_seq snd_seq_device snd_pcm microcode toshiba_acpi snd_timer sparse_keymap rfkill snd mfd_core joydev serio_raw wmi toshiba_bluetooth acpi_cpufreq soundcore hid_logitech_dj i915 i2c_algo_bit drm_kms_helper drm r8169 mii i2c_core video ums_realtek uas usb_storage
CPU: 1 PID: 910 Comm: X Not tainted 3.16.4-200.fc20.x86_64 #1
Hardware name: TOSHIBA Satellite Pro L300/Portable PC, BIOS 2.20 12/09/2009
 0000000000000000 00000000b99655d2 ffff8800b2987a70 ffffffff81707965
 ffff8800b2987ab8 ffff8800b2987aa8 ffffffff8108d0ad ffff880036060000
 0000000000070040 0000000000000023 00000000fffc1214 00000000000000aa
Call Trace:
 [<ffffffff81707965>] dump_stack+0x45/0x56
 [<ffffffff8108d0ad>] warn_slowpath_common+0x7d/0xa0
 [<ffffffff8108d12c>] warn_slowpath_fmt+0x5c/0x80
 [<ffffffffa010838e>] ? gen4_read32+0x4e/0xc0 [i915]
 [<ffffffffa0117ba9>] intel_wait_for_vblank+0x209/0x210 [i915]
 [<ffffffffa014f0e5>] intel_tv_detect+0x245/0x5c0 [i915]
 [<ffffffffa00baac3>] drm_helper_probe_single_connector_modes_merge_bits+0x293/0x3a0 [drm_kms_helper]
 [<ffffffffa00babe3>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
 [<ffffffffa006b6ff>] drm_mode_getconnector+0x3ff/0x470 [drm]
 [<ffffffff81232080>] ? fsnotify_destroy_event+0x30/0x50
 [<ffffffffa005ca6c>] drm_ioctl+0x1ec/0x660 [drm]
 [<ffffffff81206b90>] do_vfs_ioctl+0x2e0/0x4a0
 [<ffffffff81206dd1>] SyS_ioctl+0x81/0xa0
 [<ffffffff81125f76>] ? __audit_syscall_exit+0x1f6/0x2a0
 [<ffffffff8170efa9>] system_call_fastpath+0x16/0x1b