Description of problem:
Problem happens at boot time. Does not occur at any other time.

Additional info:
reporter:       libreport-2.2.3
WARNING: CPU: 1 PID: 1831 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 bnep bluetooth 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 fuse snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep arc4 snd_seq coretemp ath5k uvcvideo ath videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common videodev snd_seq_device snd_pcm toshiba_acpi iTCO_wdt mac80211 iTCO_vendor_support snd_timer cfg80211 snd lpc_ich microcode i2c_i801 mfd_core media sparse_keymap soundcore
rfkill joydev wmi shpchp toshiba_bluetooth serio_raw acpi_cpufreq hid_logitech_dj i915 i2c_algo_bit drm_kms_helper drm r8169 mii video ums_realtek uas usb_storage
CPU: 1 PID: 1831 Comm: upowerd 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 000000005b3643eb ffff880095057b90 ffffffff81726d2c
ffff880095057bd8 ffff880095057bc8 ffffffff81092e6d ffff880036420000
0000000000071040 0000000000001299 00000000fffdcdcd 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]
[<ffffffff8120fa56>] ? path_openat+0x176/0x670
[<ffffffffa0055e6d>] status_show+0x3d/0x80 [drm]
[<ffffffff814802c0>] dev_attr_show+0x20/0x60
[<ffffffff8172c452>] ? mutex_lock+0x12/0x2f
[<ffffffff8127a11c>] sysfs_kf_seq_show+0xcc/0x1e0
[<ffffffff81278913>] kernfs_seq_show+0x23/0x30
[<ffffffff81222e5a>] seq_read+0xfa/0x3a0
[<ffffffff81279185>] kernfs_fop_read+0xf5/0x160
[<ffffffff811ffae8>] vfs_read+0x98/0x170
[<ffffffff812007c5>] SyS_read+0x55/0xd0
[<ffffffff8172e3e9>] system_call_fastpath+0x16/0x1b