Additional info:
reporter:       libreport-2.3.0
WARNING: CPU: 1 PID: 1429 at drivers/gpu/drm/i915/intel_display.c:901 intel_wait_for_vblank+0x225/0x230 [i915]()
vblank wait on pipe B timed out
Modules linked in: rfcomm fuse xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 ccm nf_conntrack_netbios_ns nf_conntrack_broadcast ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 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 bnep coretemp kvm_intel snd_hda_codec_hdmi snd_hda_codec_idt snd_hda_codec_generic snd_hda_intel kvm snd_hda_controller arc4 iwldvm mac80211 iwlwifi iTCO_wdt iTCO_vendor_support dell_wmi snd_hda_codec ppdev sparse_keymap btusb snd_hwdep joydev bluetooth dell_laptop dcdbas sdhci_pci sdhci serio_raw
 cfg80211 snd_seq parport_pc snd_seq_device snd_pcm parport intel_ips tpm_tis tpm mmc_core rfkill mei_me wmi snd_timer i2c_i801 snd lpc_ich shpchp soundcore mei mfd_core dell_smo8800 acpi_cpufreq nfsd auth_rpcgss nfs_acl lockd grace sunrpc dm_crypt i915 i2c_algo_bit crc32c_intel drm_kms_helper tg3 drm firewire_ohci firewire_core ptp yenta_socket pps_core crc_itu_t video
CPU: 1 PID: 1429 Comm: Xorg.bin Not tainted 3.18.8-201.fc21.x86_64 #1
Hardware name: Dell Inc. Latitude E5410/03VXMC, BIOS A05 09/03/2010
 0000000000000000 00000000fa1ed87f ffff8800d6497658 ffffffff8175b3fc
 0000000000000000 ffff8800d64976b0 ffff8800d6497698 ffffffff81098e91
 0000000000000000 ffff8800363b0000 0000000000071040 0000000000000976
Call Trace:
 [<ffffffff8175b3fc>] dump_stack+0x46/0x58
 [<ffffffff81098e91>] warn_slowpath_common+0x81/0xa0
 [<ffffffff81098f05>] warn_slowpath_fmt+0x55/0x70
 [<ffffffffa01645f5>] intel_wait_for_vblank+0x225/0x230 [i915]
 [<ffffffffa0187abd>] intel_dp_link_down+0x1ad/0x250 [i915]
 [<ffffffffa0187fa2>] ilk_post_disable_dp+0x22/0xf0 [i915]
 [<ffffffffa016f384>] ironlake_crtc_disable+0xe4/0x800 [i915]
 [<ffffffffa01607ac>] ? intel_dump_pipe_config.isra.49+0x3c/0x3c0 [i915]
 [<ffffffffa0168ed0>] __intel_set_mode+0x2d0/0x16f0 [i915]
 [<ffffffffa01727d6>] intel_set_mode+0x16/0x30 [i915]
 [<ffffffffa017397a>] intel_crtc_set_config+0xa9a/0xea0 [i915]
 [<ffffffffa006bdd0>] drm_mode_set_config_internal+0x60/0xf0 [drm]
 [<ffffffffa00fa5c3>] restore_fbdev_mode+0xd3/0x100 [drm_kms_helper]
 [<ffffffffa00fc109>] drm_fb_helper_restore_fbdev_mode_unlocked+0x29/0x80 [drm_kms_helper]
 [<ffffffffa00fc182>] drm_fb_helper_set_par+0x22/0x50 [drm_kms_helper]
 [<ffffffffa017ea6a>] intel_fbdev_set_par+0x1a/0x60 [i915]
 [<ffffffff81401b90>] fb_set_var+0x190/0x420
 [<ffffffff810c9e68>] ? __enqueue_entity+0x78/0x80
 [<ffffffff810d03ab>] ? put_prev_entity+0x5b/0x3f0
 [<ffffffff8101f207>] ? __switch_to_xtra+0x167/0x1a0
 [<ffffffff8101291f>] ? __switch_to+0x44f/0x5f0
 [<ffffffff813f7fdc>] fbcon_blank+0x25c/0x340
 [<ffffffff8147ad6a>] do_unblank_screen+0xba/0x1f0
 [<ffffffff81471c61>] vt_ioctl+0x13b1/0x1430
 [<ffffffff8146511d>] tty_ioctl+0x2ad/0xbc0
 [<ffffffff8131a699>] ? avc_has_perm+0xd9/0x1a0
 [<ffffffff8131aaf3>] ? selinux_file_free_security+0x23/0x30
 [<ffffffff81228150>] do_vfs_ioctl+0x2d0/0x4b0
 [<ffffffff812283b1>] SyS_ioctl+0x81/0xa0
 [<ffffffff81761e29>] system_call_fastpath+0x12/0x17