Additional info:
reporter:       libreport-2.2.3
WARNING: CPU: 2 PID: 15050 at drivers/gpu/drm/i915/intel_display.c:3361 intel_crtc_wait_for_pending_flips+0x1a5/0x1b0 [i915]()
Modules linked in: tcp_lp fuse vhost_net vhost macvtap macvlan rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd sunrpc fscache xt_CHECKSUM tun xt_addrtype ipt_MASQUERADE dm_thin_pool dm_persistent_data dm_bio_prison libcrc32c loop bnep bluetooth cfg80211 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 vfat fat snd_hda_codec_realtek snd_hda_codec_generic snd_hda_codec_hdmi snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep snd_seq snd_seq_device snd_pcm intel_rapl x86_pkg_temp_thermal coretemp kvm_intel iTCO_wdt iTCO_vendor_support hp_wmi ppdev tpm_infineon sparse_keymap rfkill kvm joydev microcode serio_raw snd_timer snd soundcore parport_pc parport tpm_tis tpm mei_me e1000e mei lpc_ich ptp i2c_i801 pps_core mfd_core wmi binfmt_misc dm_crypt i915 crct10dif_pclmul crc32_pclmul crc32c_intel i2c_algo_bit drm_kms_helper ghash_clmulni_intel drm video
CPU: 2 PID: 15050 Comm: Xorg Not tainted 3.17.8-200.fc20.x86_64 #1
Hardware name: Hewlett-Packard HP EliteDesk 800 G1 SFF/1998, BIOS L01 v02.21 12/17/2013
 0000000000000000 00000000fb316a53 ffff880332483788 ffffffff81728f6c
 0000000000000000 ffff8803324837c0 ffffffff81092e7d 0000000000000000
 ffff8804083ac000 ffff88003f5182c0 ffff880405715000 0000000000000000
Call Trace:
 [<ffffffff81728f6c>] dump_stack+0x45/0x56
 [<ffffffff81092e7d>] warn_slowpath_common+0x7d/0xa0
 [<ffffffff81092faa>] warn_slowpath_null+0x1a/0x20
 [<ffffffffa013c7b5>] intel_crtc_wait_for_pending_flips+0x1a5/0x1b0 [i915]
 [<ffffffff810d1880>] ? prepare_to_wait_event+0xf0/0xf0
------------[ cut here ]------------
 [<ffffffffa0143c44>] intel_crtc_disable_planes+0x34/0x160 [i915]
 [<ffffffffa0144b65>] haswell_crtc_disable+0x55/0x330 [i915]
 [<ffffffffa013e9c1>] __intel_set_mode+0x7a1/0x1610 [i915]
 [<ffffffffa0147076>] intel_set_mode+0x16/0x30 [i915]
 [<ffffffffa014802c>] intel_crtc_set_config+0x92c/0xe60 [i915]
 [<ffffffffa002b584>] drm_mode_set_config_internal+0x64/0xf0 [drm]
 [<ffffffffa0084c13>] restore_fbdev_mode+0xb3/0xe0 [drm_kms_helper]
 [<ffffffffa0084c63>] drm_fb_helper_restore_fbdev_mode_unlocked+0x23/0x40 [drm_kms_helper]
 [<ffffffffa0086878>] drm_fb_helper_set_par+0x28/0x70 [drm_kms_helper]
 [<ffffffffa0152daa>] intel_fbdev_set_par+0x1a/0x60 [i915]
 [<ffffffff813e0bb6>] ? fb_set_var+0x206/0x440
 [<ffffffff813e0b47>] fb_set_var+0x197/0x440
 [<ffffffff810c8c57>] ? enqueue_entity+0x237/0x8c0
 [<ffffffff810c7cca>] ? check_preempt_wakeup+0x12a/0x220
 [<ffffffff810c6be7>] ? update_curr+0x67/0x160
 [<ffffffff813d74e1>] fbcon_blank+0x1f1/0x2f0
 [<ffffffff814581f8>] do_unblank_screen+0xb8/0x1f0
 [<ffffffff8144e06a>] complete_change_console+0x5a/0xe0
 [<ffffffff8144f0c5>] vt_ioctl+0xfd5/0x1190
 [<ffffffff81442c69>] tty_ioctl+0x289/0xb70
 [<ffffffff8123eaa8>] ? fsnotify+0x238/0x310
 [<ffffffff812136b0>] do_vfs_ioctl+0x2e0/0x4a0
 [<ffffffff812138f1>] SyS_ioctl+0x81/0xa0
WARNING: CPU: 2 PID: 15050 at drivers/gpu/drm/i915/intel_display.c:3361 intel_crtc_wait_for_pending_flips+0x1a5/0x1b0 [i915]()
 [<ffffffff81730629>] system_call_fastpath+0x16/0x1b