Description of problem:
Install fedora 21 and boot.

Additional info:
reporter:       libreport-2.3.0
WARNING: CPU: 1 PID: 968 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: nls_utf8 isofs fuse xt_CHECKSUM ipt_MASQUERADE 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 bnep arc4 x86_pkg_temp_thermal coretemp kvm_intel kvm vfat fat iwlmvm mac80211 iTCO_wdt iTCO_vendor_support iwlwifi joydev snd_hda_codec_realtek snd_hda_codec_hdmi snd_hda_codec_generic uvcvideo cfg80211 serio_raw videobuf2_vmalloc videobuf2_memops videobuf2_core i2c_i801 snd_hda_intel v4l2_common snd_hda_controller videodev snd_hda_codec media btusb snd_hwdep lpc_ich
 snd_seq bluetooth snd_seq_device rtsx_pci_ms snd_pcm memstick mei_me shpchp mei thinkpad_acpi snd_timer wmi snd tpm_tis soundcore rfkill tpm dm_thin_pool dm_persistent_data dm_bio_prison libcrc32c dm_crypt uas usb_storage i915 rtsx_pci_sdmmc mmc_core crct10dif_pclmul crc32_pclmul crc32c_intel i2c_algo_bit e1000e drm_kms_helper ghash_clmulni_intel drm rtsx_pci mfd_core ptp pps_core video
CPU: 1 PID: 968 Comm: Xorg.bin Not tainted 3.17.1-302.fc21.x86_64 #1
Hardware name: LENOVO 20ARS19C0B/20ARS19C0B, BIOS GJET78WW (2.28 ) 07/29/2014
 0000000000000000 0000000093ce7afa ffff8800b5e97760 ffffffff8173dbb1
 ffff8800b5e977a8 ffff8800b5e97798 ffffffff81096e8d 0000000000000000
 ffff88032bd31000 ffff880329014800 ffff880328030000 0000000000000000
Call Trace:
 [<ffffffff8173dbb1>] dump_stack+0x45/0x56
 [<ffffffff81096e8d>] warn_slowpath_common+0x7d/0xa0
 [<ffffffff81096f0c>] warn_slowpath_fmt+0x5c/0x80
 [<ffffffffa018bf5b>] assert_plane.constprop.78+0x6b/0x70 [i915]
 [<ffffffffa01912c1>] hsw_disable_ips+0x41/0x190 [i915]
 [<ffffffffa0197bb9>] intel_crtc_disable_planes+0x49/0x160 [i915]
 [<ffffffffa0142e66>] ? intel_update_fbc+0x196/0x660 [i915]
 [<ffffffffa0198ad7>] haswell_crtc_disable+0x57/0x340 [i915]
 [<ffffffffa0192761>] __intel_set_mode+0x7e1/0x16f0 [i915]
 [<ffffffff815b147a>] ? __map_bio+0x3a/0x100
 [<ffffffffa019b086>] intel_set_mode+0x16/0x30 [i915]
 [<ffffffffa019c1da>] intel_crtc_set_config+0xa9a/0xeb0 [i915]
 [<ffffffffa003ea34>] drm_mode_set_config_internal+0x64/0xe0 [drm]
 [<ffffffffa0083153>] restore_fbdev_mode+0xb3/0xe0 [drm_kms_helper]
 [<ffffffffa00831a3>] drm_fb_helper_restore_fbdev_mode_unlocked+0x23/0x40 [drm_kms_helper]
 [<ffffffffa0084ca8>] drm_fb_helper_set_par+0x28/0x70 [drm_kms_helper]
 [<ffffffffa01a6d5a>] intel_fbdev_set_par+0x1a/0x60 [i915]
 [<ffffffff813f2c90>] fb_set_var+0x190/0x420
 [<ffffffff812222fa>] ? do_sys_poll+0x14a/0x570
 [<ffffffff817429e2>] ? mutex_lock+0x12/0x30
 [<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
 [<ffffffff81220601>] SyS_ioctl+0x81/0xa0
 [<ffffffff81744d29>] system_call_fastpath+0x16/0x1b