Description of problem:
during the boot.

Additional info:
reporter:       libreport-2.2.3
WARNING: CPU: 0 PID: 710 at drivers/gpu/drm/i915/intel_display.c:902 intel_wait_for_vblank+0x209/0x210 [i915]()
vblank wait timed out
Modules linked in: snd_hda_codec_hdmi snd_hda_codec_idt snd_hda_codec_generic snd_hda_intel snd_hda_controller snd_hda_codec dell_laptop rfkill snd_hwdep iTCO_wdt sdhci_pci snd_seq snd_seq_device snd_pcm coretemp iTCO_vendor_support kvm_intel dell_wmi sdhci snd_timer joydev mmc_core dcdbas snd gpio_ich sparse_keymap ppdev serio_raw kvm soundcore i2c_i801 lpc_ich mfd_core wmi shpchp parport_pc parport tpm_tis tpm acpi_cpufreq nfsd auth_rpcgss nfs_acl lockd sunrpc binfmt_misc ata_generic firewire_ohci pata_acpi i915 firewire_core crc_itu_t e1000e i2c_algo_bit drm_kms_helper ptp drm pps_core video
CPU: 0 PID: 710 Comm: X Not tainted 3.17.2-200.fc20.x86_64 #1
Hardware name: Dell Inc. Latitude E6400                  /0G866N, BIOS A12 02/13/2009
0000000000000000 00000000bf260324 ffff88007809ba70 ffffffff817271cc
ffff88007809bab8 ffff88007809baa8 ffffffff81094ced ffff8800366d0000
0000000000070040 0000000000000022 00000000fffbdb54 00000000000000aa
Call Trace:
[<ffffffff817271cc>] dump_stack+0x45/0x56
[<ffffffff81094ced>] warn_slowpath_common+0x7d/0xa0
[<ffffffff81094d6c>] warn_slowpath_fmt+0x5c/0x80
[<ffffffffa0129afb>] ? gen4_read32+0x4b/0xc0 [i915]
[<ffffffffa013a169>] intel_wait_for_vblank+0x209/0x210 [i915]
[<ffffffffa0175b65>] intel_tv_detect+0x245/0x5c0 [i915]
[<ffffffffa007ab03>] drm_helper_probe_single_connector_modes_merge_bits+0x2c3/0x3d0 [drm_kms_helper]
[<ffffffffa007ac23>] drm_helper_probe_single_connector_modes+0x13/0x20 [drm_kms_helper]
[<ffffffffa002b58f>] drm_mode_getconnector+0x3ff/0x470 [drm]
[<ffffffff8123fea0>] ? fsnotify_destroy_event+0x30/0x50
[<ffffffffa001de0c>] drm_ioctl+0x1ec/0x660 [drm]
[<ffffffff81214830>] do_vfs_ioctl+0x2e0/0x4a0
[<ffffffff81203d31>] ? __sb_end_write+0x31/0x60
[<ffffffff81201712>] ? vfs_write+0x172/0x1f0
[<ffffffff81214a71>] SyS_ioctl+0x81/0xa0
[<ffffffff81131116>] ? __audit_syscall_exit+0x1f6/0x2a0
[<ffffffff8172e869>] system_call_fastpath+0x16/0x1b