Additional info:
reporter:       libreport-2.3.0
WARNING: CPU: 0 PID: 1219 at drivers/gpu/drm/i915/intel_display.c:1278 assert_plane.constprop.78+0x6b/0x70 [i915]()
plane A assertion failure (expected on, current off)
Modules linked in: binfmt_misc bnep bluetooth fuse ccm xt_CHECKSUM ipt_MASQUERADE tun nf_conntrack_netbios_ns nf_conntrack_broadcast 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 x86_pkg_temp_thermal arc4 snd_usb_audio snd_usbmidi_lib snd_rawmidi coretemp 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 iwlmvm mac80211 snd_pcm iTCO_wdt iTCO_vendor_support iwlwifi kvm snd_timer cfg80211
 thinkpad_acpi snd serio_raw soundcore rfkill wmi lpc_ich mfd_core shpchp mei_me mei i2c_i801 dm_crypt ax88179_178a usbnet btrfs xor raid6_pq radeon i915 crct10dif_pclmul crc32_pclmul crc32c_intel ttm i2c_algo_bit ghash_clmulni_intel drm_kms_helper drm r8169 mii video
CPU: 0 PID: 1219 Comm: Xorg.bin Not tainted 3.17.1-304.fc21.x86_64 #1
Hardware name: LENOVO 20B3CTO1WW/20B3CTO1WW, BIOS GPET58WW (1.58 ) 06/16/2014
 0000000000000000 000000006434c882 ffff880215dc3760 ffffffff8173dbb1
 ffff880215dc37a8 ffff880215dc3798 ffffffff81096e8d 0000000000000000
 ffff88022310b000 ffff880221642800 ffff8800366a0000 0000000000000000
Call Trace:
 [<ffffffff8173dbb1>] dump_stack+0x45/0x56
 [<ffffffff81096e8d>] warn_slowpath_common+0x7d/0xa0
 [<ffffffff81096f0c>] warn_slowpath_fmt+0x5c/0x80
 [<ffffffffa0154f5b>] assert_plane.constprop.78+0x6b/0x70 [i915]
 [<ffffffffa015a2c1>] hsw_disable_ips+0x41/0x190 [i915]
 [<ffffffffa0160bb9>] intel_crtc_disable_planes+0x49/0x160 [i915]
 [<ffffffffa010be66>] ? intel_update_fbc+0x196/0x660 [i915]
 [<ffffffffa0161ad7>] haswell_crtc_disable+0x57/0x340 [i915]
 [<ffffffffa015b761>] __intel_set_mode+0x7e1/0x16f0 [i915]
 [<ffffffff8140f78f>] ? acpi_ds_init_object_from_op+0x33/0x276
 [<ffffffffa0164086>] intel_set_mode+0x16/0x30 [i915]
 [<ffffffffa01651da>] intel_crtc_set_config+0xa9a/0xeb0 [i915]
 [<ffffffffa0037a34>] drm_mode_set_config_internal+0x64/0xe0 [drm]
 [<ffffffffa00f3153>] restore_fbdev_mode+0xb3/0xe0 [drm_kms_helper]
 [<ffffffffa00f31a3>] drm_fb_helper_restore_fbdev_mode_unlocked+0x23/0x40 [drm_kms_helper]
 [<ffffffffa00f4ca8>] drm_fb_helper_set_par+0x28/0x70 [drm_kms_helper]
 [<ffffffffa016fd5a>] intel_fbdev_set_par+0x1a/0x60 [i915]
 [<ffffffff813f2c90>] fb_set_var+0x190/0x420
 [<ffffffff8119c006>] ? free_hot_cold_page_list+0x46/0xa0
 [<ffffffff813e9059>] fbcon_blank+0x259/0x340
 [<ffffffff8146ab0a>] do_unblank_screen+0xba/0x1f0
 [<ffffffff81461b81>] vt_ioctl+0x13b1/0x1430
 [<ffffffff8130eef7>] ? avc_alloc_node+0x27/0x130
 [<ffffffff814552ad>] tty_ioctl+0x2ad/0xbf0
 [<ffffffff8130f6b9>] ? avc_has_perm+0xd9/0x1a0
 [<ffffffff812203a0>] do_vfs_ioctl+0x2d0/0x4b0
 [<ffffffff8120de4e>] ? ____fput+0xe/0x10
 [<ffffffff81220601>] SyS_ioctl+0x81/0xa0
 [<ffffffff81744d29>] system_call_fastpath+0x16/0x1b