Description of problem:
Happened while booting

Additional info:
reporter:       libreport-2.2.3
WARNING: CPU: 1 PID: 3955 at drivers/gpu/drm/i915/intel_display.c:902 intel_wait_for_vblank+0x209/0x210 [i915]()
vblank wait timed out
Modules linked in: tun ccm ip6t_rpfilter 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 ath5k ath mac80211 cfg80211 uvcvideo videobuf2_vmalloc snd_hda_codec_hdmi coretemp snd_hda_codec_realtek videobuf2_memops videobuf2_core v4l2_common videodev media iTCO_wdt snd_hda_codec_generic snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep iTCO_vendor_support toshiba_acpi lpc_ich mfd_core i2c_i801 microcode snd_seq snd_seq_device serio_raw snd_pcm sparse_keymap joydev rfkill
acpi_cpufreq snd_timer wmi toshiba_bluetooth shpchp snd soundcore hid_logitech_dj i915 i2c_algo_bit drm_kms_helper drm r8169 mii video ums_realtek uas usb_storage
CPU: 1 PID: 3955 Comm: plymouthd 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 00000000507c5e86 ffff88009606ba70 ffffffff81726d2c
ffff88009606bab8 ffff88009606baa8 ffffffff81092e6d ffff880036e90000
0000000000070040 000000000002525d 000000010022ef77 00000000000000aa
Call Trace:
[<ffffffff81726d2c>] dump_stack+0x45/0x56
[<ffffffff81092e6d>] warn_slowpath_common+0x7d/0xa0
[<ffffffff81092eec>] warn_slowpath_fmt+0x5c/0x80
[<ffffffffa0103b8b>] ? gen4_read32+0x4b/0xc0 [i915]
[<ffffffffa0114209>] intel_wait_for_vblank+0x209/0x210 [i915]
[<ffffffffa014fc45>] intel_tv_detect+0x245/0x5c0 [i915]
[<ffffffffa013a5d6>] ? intel_dp_detect+0x126/0x220 [i915]
[<ffffffffa00abb03>] drm_helper_probe_single_connector_modes_merge_bits+0x2c3/0x3d0 [drm_kms_helper]
[<ffffffffa00abc23>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
[<ffffffffa005c58f>] drm_mode_getconnector+0x3ff/0x470 [drm]
[<ffffffff811f34be>] ? commit_charge+0x2e/0xb0
[<ffffffffa004ee0c>] drm_ioctl+0x1ec/0x660 [drm]
[<ffffffff810c355f>] ? set_next_entity+0x5f/0x80
[<ffffffff81212e50>] do_vfs_ioctl+0x2e0/0x4a0
[<ffffffff81213091>] SyS_ioctl+0x81/0xa0
[<ffffffff8112f416>] ? __audit_syscall_exit+0x1f6/0x2a0
[<ffffffff8172e3e9>] system_call_fastpath+0x16/0x1b

Potential duplicate: bug 1171485