Additional info:
reporter:       libreport-2.3.0
WARNING: CPU: 3 PID: 22600 at drivers/gpu/drm/i915/intel_display.c:1292 assert_plane.constprop.78+0x73/0x80 [i915]()
plane A assertion failure (expected on, current off)
Modules linked in: ccm 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 rtsx_usb_ms memstick uvcvideo videobuf2_vmalloc videobuf2_core videobuf2_memops v4l2_common intel_rapl x86_pkg_temp_thermal arc4 ath9k dell_wmi dell_led snd_hda_codec_realtek iTCO_wdt snd_hda_codec_hdmi snd_hda_codec_generic videodev snd_hda_intel coretemp sparse_keymap iTCO_vendor_support hid_rmi kvm_intel ath9k_common snd_hda_controller ath9k_hw ath joydev media mac80211 snd_hda_codec kvm snd_hwdep
 ath3k btusb bluetooth crct10dif_pclmul cfg80211 snd_seq snd_seq_device crc32_pclmul dell_laptop crc32c_intel snd_pcm snd_timer ghash_clmulni_intel dcdbas rfkill snd dw_dmac tpm_tis shpchp dw_dmac_core tpm serio_raw wmi lpc_ich i2c_i801 mei_me mei soundcore i2c_hid i2c_designware_platform i2c_designware_core nfsd auth_rpcgss nfs_acl lockd grace sunrpc rtsx_usb_sdmmc rtsx_usb mfd_core i915 i2c_algo_bit drm_kms_helper drm r8169 sdhci_acpi sdhci mii mmc_core video
CPU: 3 PID: 22600 Comm: swapoff Not tainted 3.18.3-201.fc21.x86_64 #1
Hardware name: Dell Inc. Inspiron 3542/09V1VC, BIOS A03 05/27/2014
 0000000000000000 0000000028eb2860 ffff8802036af9f8 ffffffff8175da66
 0000000000000000 ffff8802036afa50 ffff8802036afa38 ffffffff81099181
 ffff88021fde86c0 0000000000000000 ffff88021434c000 ffff880036824000
Call Trace:
 [<ffffffff8175da66>] dump_stack+0x46/0x58
 [<ffffffff81099181>] warn_slowpath_common+0x81/0xa0
 [<ffffffff810991f5>] warn_slowpath_fmt+0x55/0x70
 [<ffffffffa0134ea3>] assert_plane.constprop.78+0x73/0x80 [i915]
 [<ffffffffa013a771>] hsw_disable_ips+0x41/0x190 [i915]
 [<ffffffffa0141348>] intel_crtc_disable_planes+0x48/0x150 [i915]
 [<ffffffffa014233f>] haswell_crtc_disable+0x4f/0x310 [i915]
 [<ffffffffa013be41>] __intel_set_mode+0x7f1/0x16f0 [i915]
 [<ffffffffa0144c36>] intel_set_mode+0x16/0x30 [i915]
 [<ffffffffa0145dda>] intel_crtc_set_config+0xa9a/0xea0 [i915]
 [<ffffffff811f4e9d>] ? __slab_free+0xbd/0x300
 [<ffffffffa0071e30>] drm_mode_set_config_internal+0x60/0xf0 [drm]
 [<ffffffffa00cd553>] restore_fbdev_mode+0xd3/0x100 [drm_kms_helper]
 [<ffffffffa00cf099>] drm_fb_helper_restore_fbdev_mode_unlocked+0x29/0x80 [drm_kms_helper]
 [<ffffffffa01523de>] intel_fbdev_restore_mode+0x1e/0x50 [i915]
 [<ffffffffa0178e65>] i915_driver_lastclose+0x45/0x50 [i915]
 [<ffffffffa0065d1e>] drm_lastclose+0x2e/0x150 [drm]
 [<ffffffffa0066108>] drm_release+0x2c8/0x4b0 [drm]
 [<ffffffff8121734c>] __fput+0xdc/0x1f0
 [<ffffffff812174ae>] ____fput+0xe/0x10
 [<ffffffff810b6574>] task_work_run+0xd4/0xf0
 [<ffffffff81013e27>] do_notify_resume+0x97/0xb0
 [<ffffffff81764a47>] int_signal+0x12/0x17