Additional info:
reporter:       libreport-2.4.0
WARNING: CPU: 1 PID: 895 at drivers/gpu/drm/i915/i915_gem.c:4284 i915_gem_object_unpin_fence+0x75/0xa0 [i915]()
WARN_ON(dev_priv->fence_regs[obj->fence_reg].pin_count <= 0)
Modules linked in: xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 tun ccm nf_conntrack_netbios_ns nf_conntrack_broadcast ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ebtable_nat ebtable_broute bridge 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 intel_rapl iTCO_wdt iTCO_vendor_support iosf_mbi iwlmvm x86_pkg_temp_thermal coretemp vfat kvm_intel mac80211 fat kvm snd_hda_codec_hdmi snd_hda_codec_realtek snd_hda_codec_generic snd_hda_intel iwlwifi snd_hda_controller uvcvideo snd_hda_codec cfg80211 videobuf2_vmalloc snd_hwdep serio_raw snd_seq
 videobuf2_core snd_seq_device videobuf2_memops i2c_i801 rtsx_pci_ms memstick btusb v4l2_common snd_pcm videodev lpc_ich shpchp bluetooth thinkpad_acpi tpm_tis snd_timer wmi mei_me media tpm snd intel_rst mei rfkill soundcore nfsd auth_rpcgss nfs_acl lockd grace sunrpc dm_crypt 8021q garp stp llc mrp i915 rtsx_pci_sdmmc mmc_core e1000e crct10dif_pclmul i2c_algo_bit crc32_pclmul drm_kms_helper crc32c_intel drm ghash_clmulni_intel rtsx_pci ptp mfd_core pps_core video
CPU: 1 PID: 895 Comm: systemd-logind Not tainted 4.0.0-0.rc2.git0.1.fc22.x86_64 #1
Hardware name: LENOVO 20CMCTO1WW/20CMCTO1WW, BIOS N10ET28W (1.05 ) 01/23/2015
 0000000000000000 0000000026e16ddd ffff880219aa76c8 ffffffff81780388
 0000000000000000 ffff880219aa7720 ffff880219aa7708 ffffffff8109c83a
 ffff880219aa7768 ffff880220530000 ffff88003f1f2a00 ffffffffa0228f80
Call Trace:
 [<ffffffff81780388>] dump_stack+0x45/0x57
 [<ffffffff8109c83a>] warn_slowpath_common+0x8a/0xc0
 [<ffffffff8109c8c5>] warn_slowpath_fmt+0x55/0x70
 [<ffffffffa0199905>] i915_gem_object_unpin_fence+0x75/0xa0 [i915]
 [<ffffffffa01d5545>] intel_unpin_fb_obj+0x25/0x60 [i915]
 [<ffffffffa01e191d>] intel_cleanup_plane_fb+0x3d/0x80 [i915]
 [<ffffffffa00d48be>] drm_plane_helper_commit+0x1fe/0x300 [drm_kms_helper]
 [<ffffffffa00d4a5a>] drm_plane_helper_update+0x9a/0xf0 [drm_kms_helper]
 [<ffffffffa01e1426>] intel_crtc_set_config+0xdb6/0x1010 [i915]
 [<ffffffffa0069056>] drm_mode_set_config_internal+0x66/0x100 [drm]
 [<ffffffffa00dd738>] restore_fbdev_mode+0xc8/0xf0 [drm_kms_helper]
 [<ffffffffa00df789>] drm_fb_helper_restore_fbdev_mode_unlocked+0x29/0x80 [drm_kms_helper]
 [<ffffffffa00df802>] drm_fb_helper_set_par+0x22/0x50 [drm_kms_helper]
 [<ffffffffa01f0b4a>] intel_fbdev_set_par+0x1a/0x60 [i915]
 [<ffffffff8141f483>] ? cfb_imageblit+0x503/0x540
 [<ffffffff814182f6>] fb_set_var+0x236/0x480
 [<ffffffff810d3d3c>] ? update_curr+0x5c/0x160
 [<ffffffff8140ddfc>] fbcon_blank+0x34c/0x390
 [<ffffffff81412320>] ? bit_clear+0x120/0x120
 [<ffffffff8101365b>] ? __switch_to+0x19b/0x5f0
 [<ffffffff81494cfa>] do_unblank_screen+0xda/0x1d0
 [<ffffffff8148934d>] complete_change_console+0x5d/0xf0
 [<ffffffff8148a7eb>] vt_ioctl+0x140b/0x1430
 [<ffffffff8147c621>] tty_ioctl+0x3f1/0xc30
 [<ffffffff8132a718>] ? avc_has_perm+0x128/0x1a0
 [<ffffffff810fbfb7>] ? __call_rcu_nocb_enqueue+0xd7/0xe0
 [<ffffffff812350f6>] do_vfs_ioctl+0x2c6/0x4d0
 [<ffffffff81235381>] SyS_ioctl+0x81/0xa0
 [<ffffffff817867a9>] system_call_fastpath+0x12/0x17