Description of problem:
Happened at boot time.

Additional info:
reporter:       libreport-2.2.3
WARNING: CPU: 1 PID: 925 at drivers/gpu/drm/i915/intel_display.c:902 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 snd_hda_codec_hdmi arc4 uvcvideo ath5k snd_hda_codec_realtek snd_hda_codec_generic videobuf2_vmalloc ath mac80211 cfg80211 iTCO_wdt iTCO_vendor_support toshiba_acpi coretemp sparse_keymap videobuf2_memops snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_seq snd_seq_device rfkill videobuf2_core v4l2_common videodev media i2c_i801 snd_pcm snd_timer snd lpc_ich mfd_core wmi microcode toshiba_bluetooth serio_raw joydev shpchp soundcore acpi_cpufreq hid_logitech_dj ums_realtek uas usb_storage i915 r8169 i2c_algo_bit drm_kms_helper mii drm video
CPU: 1 PID: 925 Comm: X Not tainted 3.17.4-200.fc20.x86_64 #1
Hardware name: TOSHIBA Satellite Pro L300/Portable PC, BIOS 2.20 12/09/2009
 0000000000000000 0000000030e17b98 ffff8800a38c7a70 ffffffff81726d2c
 ffff8800a38c7ab8 ffff8800a38c7aa8 ffffffff81092e6d ffff880138570000
 0000000000070040 0000000000000016 00000000fffc09ab 00000000000000aa
Call Trace:
 [<ffffffff81726d2c>] dump_stack+0x45/0x56
 [<ffffffff81092e6d>] warn_slowpath_common+0x7d/0xa0
 [<ffffffff81092eec>] warn_slowpath_fmt+0x5c/0x80
 [<ffffffffa00d2b8b>] ? gen4_read32+0x4b/0xc0 [i915]
 [<ffffffffa00e3209>] intel_wait_for_vblank+0x209/0x210 [i915]
 [<ffffffffa011ec45>] intel_tv_detect+0x245/0x5c0 [i915]
 [<ffffffffa005ab03>] drm_helper_probe_single_connector_modes_merge_bits+0x2c3/0x3d0 [drm_kms_helper]
 [<ffffffffa005ac23>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
 [<ffffffffa002158f>] drm_mode_getconnector+0x3ff/0x470 [drm]
 [<ffffffff8123e540>] ? fsnotify_destroy_event+0x30/0x50
 [<ffffffffa0013e0c>] drm_ioctl+0x1ec/0x660 [drm]
 [<ffffffff81212e50>] do_vfs_ioctl+0x2e0/0x4a0
 [<ffffffff81213091>] SyS_ioctl+0x81/0xa0
 [<ffffffff8112f416>] ? __audit_syscall_exit+0x1f6/0x2a0
 [<ffffffff8172e3e9>] system_call_fastpath+0x16/0x1b