Additional info:
reporter:       libreport-2.3.0
WARNING: CPU: 2 PID: 1357 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: tun rfcomm fuse ccm xt_CHECKSUM ipt_MASQUERADE 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 arc4 bnep iwlmvm mac80211 iTCO_wdt iTCO_vendor_support x86_pkg_temp_thermal coretemp iwlwifi snd_hda_codec_hdmi snd_hda_codec_realtek kvm_intel snd_hda_codec_generic kvm snd_hda_intel btusb snd_hda_controller uvcvideo bluetooth cfg80211 videobuf2_vmalloc snd_hda_codec videobuf2_memops videobuf2_core snd_hwdep v4l2_common snd_seq
 videodev snd_seq_device serio_raw rtsx_pci_ms i2c_i801 snd_pcm media memstick lpc_ich shpchp wmi thinkpad_acpi snd_timer mei_me tpm_tis snd mei tpm rfkill soundcore dm_crypt i915 i2c_algo_bit drm_kms_helper crct10dif_pclmul rtsx_pci_sdmmc mmc_core drm crc32_pclmul e1000e crc32c_intel rtsx_pci ghash_clmulni_intel mfd_core ptp pps_core video
CPU: 2 PID: 1357 Comm: Xorg.bin Not tainted 3.17.7-300.fc21.x86_64 #1
Hardware name: LENOVO 20ARS0LE00/20ARS0LE00, BIOS GJET75WW (2.25 ) 03/28/2014
 0000000000000000 000000004cffa97d ffff8800c5fe3760 ffffffff817401ea
 ffff8800c5fe37a8 ffff8800c5fe3798 ffffffff810970bd 0000000000000000
 ffff88030cd35000 ffff88030a121800 ffff880036a10000 0000000000000000
Call Trace:
 [<ffffffff817401ea>] dump_stack+0x45/0x56
 [<ffffffff810970bd>] warn_slowpath_common+0x7d/0xa0
 [<ffffffff8109713c>] warn_slowpath_fmt+0x5c/0x80
 [<ffffffffa01a1fab>] assert_plane.constprop.78+0x6b/0x70 [i915]
 [<ffffffffa01a7311>] hsw_disable_ips+0x41/0x190 [i915]
 [<ffffffffa01adc09>] intel_crtc_disable_planes+0x49/0x160 [i915]
 [<ffffffffa01aeb17>] haswell_crtc_disable+0x57/0x330 [i915]
 [<ffffffffa01a87b1>] __intel_set_mode+0x7e1/0x16f0 [i915]
 [<ffffffffa01b18a2>] ? intel_crtc_set_config+0x112/0xeb0 [i915]
 [<ffffffffa01b10d6>] intel_set_mode+0x16/0x30 [i915]
 [<ffffffffa01b222a>] intel_crtc_set_config+0xa9a/0xeb0 [i915]
 [<ffffffffa00c5a34>] drm_mode_set_config_internal+0x64/0xe0 [drm]
 [<ffffffffa0140153>] restore_fbdev_mode+0xb3/0xe0 [drm_kms_helper]
 [<ffffffffa01401a3>] drm_fb_helper_restore_fbdev_mode_unlocked+0x23/0x40 [drm_kms_helper]
 [<ffffffffa0141ca8>] drm_fb_helper_set_par+0x28/0x70 [drm_kms_helper]
 [<ffffffffa01bcdaa>] intel_fbdev_set_par+0x1a/0x60 [i915]
 [<ffffffff813f4aa0>] fb_set_var+0x190/0x420
 [<ffffffff81222f4a>] ? do_sys_poll+0x14a/0x570
 [<ffffffff813eb0c9>] fbcon_blank+0x259/0x340
 [<ffffffff8146c9da>] do_unblank_screen+0xba/0x1f0
 [<ffffffff81463a41>] vt_ioctl+0x13b1/0x1430
 [<ffffffff81310d57>] ? avc_alloc_node+0x27/0x130
 [<ffffffff8145716d>] tty_ioctl+0x2ad/0xbf0
 [<ffffffff81311519>] ? avc_has_perm+0xd9/0x1a0
 [<ffffffff81220ff0>] do_vfs_ioctl+0x2d0/0x4b0
 [<ffffffff81221251>] SyS_ioctl+0x81/0xa0
 [<ffffffff817473a9>] system_call_fastpath+0x16/0x1b