Additional info:
reporter:       libreport-2.3.0
WARNING: CPU: 0 PID: 888 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: cpufreq_stats fuse xt_CHECKSUM ipt_MASQUERADE tun nf_conntrack_netbios_ns nf_conntrack_broadcast ip6t_rpfilter ip6t_REJECT xt_conntrack bnep 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 hid_sensor_incl_3d hid_sensor_rotation hid_sensor_magn_3d hid_sensor_gyro_3d hid_sensor_accel_3d hid_sensor_als hid_sensor_trigger industrialio_triggered_buffer kfifo_buf industrialio hid_sensor_iio_common iTCO_wdt iwlmvm iTCO_vendor_support x86_pkg_temp_thermal coretemp mac80211 kvm_intel kvm crct10dif_pclmul
 crc32_pclmul crc32c_intel uvcvideo btusb iwlwifi bluetooth videobuf2_vmalloc videobuf2_memops videobuf2_core vfat fat ghash_clmulni_intel snd_hda_codec_realtek v4l2_common serio_raw snd_hda_codec_generic videodev snd_hda_codec_hdmi hid_multitouch cfg80211 media hid_sensor_hub snd_hda_intel snd_hda_controller snd_hda_codec snd_hwdep mei_me snd_seq i2c_i801 snd_seq_device ideapad_laptop snd_pcm lpc_ich mei mfd_core shpchp sparse_keymap rfkill snd_timer dw_dmac dw_dmac_core snd int3403_thermal i2c_hid i2c_designware_platform soundcore i2c_designware_core btrfs xor raid6_pq i915 i2c_algo_bit drm_kms_helper drm sdhci_acpi sdhci mmc_core video analog gameport joydev
CPU: 0 PID: 888 Comm: Xorg.bin Not tainted 3.17.1-302.fc21.x86_64 #1
Hardware name: LENOVO 20266/Yoga2, BIOS 76CN31WW 10/31/2013
 0000000000000000 00000000848afdf8 ffff88023354b848 ffffffff8173dbb1
 ffff88023354b890 ffff88023354b880 ffffffff81096e8d 0000000000000000
 ffff880250d2f000 ffff880253156000 ffff88007fab0000 0000000000000000
Call Trace:
 [<ffffffff8173dbb1>] dump_stack+0x45/0x56
 [<ffffffff81096e8d>] warn_slowpath_common+0x7d/0xa0
 [<ffffffff81096f0c>] warn_slowpath_fmt+0x5c/0x80
 [<ffffffffa012bf5b>] assert_plane.constprop.78+0x6b/0x70 [i915]
 [<ffffffffa01312c1>] hsw_disable_ips+0x41/0x190 [i915]
 [<ffffffffa0137bb9>] intel_crtc_disable_planes+0x49/0x160 [i915]
 [<ffffffffa0138ad7>] haswell_crtc_disable+0x57/0x340 [i915]
 [<ffffffffa0132761>] __intel_set_mode+0x7e1/0x16f0 [i915]
 [<ffffffff81391d41>] ? sg_kfree+0x11/0x30
 [<ffffffffa013b086>] intel_set_mode+0x16/0x30 [i915]
 [<ffffffffa013c1da>] intel_crtc_set_config+0xa9a/0xeb0 [i915]
 [<ffffffffa006fa34>] drm_mode_set_config_internal+0x64/0xe0 [drm]
 [<ffffffffa00ca153>] restore_fbdev_mode+0xb3/0xe0 [drm_kms_helper]
 [<ffffffffa00ca1a3>] drm_fb_helper_restore_fbdev_mode_unlocked+0x23/0x40 [drm_kms_helper]
 [<ffffffffa01480ce>] intel_fbdev_restore_mode+0x1e/0x50 [i915]
 [<ffffffffa016e4ed>] i915_driver_lastclose+0x3d/0x50 [i915]
 [<ffffffffa0064064>] drm_lastclose+0x34/0x1a0 [drm]
 [<ffffffffa0064488>] drm_release+0x2b8/0x490 [drm]
 [<ffffffff8120dcec>] __fput+0xdc/0x1f0
 [<ffffffff8120de4e>] ____fput+0xe/0x10
 [<ffffffff810b3744>] task_work_run+0xd4/0xf0
 [<ffffffff81099682>] do_exit+0x392/0xaa0
 [<ffffffff81099e13>] do_group_exit+0x43/0xc0
 [<ffffffff810a5895>] get_signal+0x2a5/0x6b0
 [<ffffffff810135d7>] do_signal+0x37/0x6f0
 [<ffffffff81223b88>] ? __dentry_kill+0x148/0x1c0
 [<ffffffff8120dd8a>] ? __fput+0x17a/0x1f0
 [<ffffffff81013cf9>] do_notify_resume+0x69/0xb0
 [<ffffffff8174599f>] retint_signal+0x48/0x89