Additional info:
reporter:       libreport-2.3.0
WARNING: CPU: 1 PID: 50 at drivers/gpu/drm/i915/intel_uncore.c:47 assert_device_not_suspended.isra.8+0x4c/0x60 [i915]()
Device suspended
Modules linked in: vhost_net vhost macvtap macvlan tun rfcomm fuse xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 ccm nf_conntrack_netbios_ns nf_conntrack_broadcast 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 bnep nf_nat nf_conntrack iptable_mangle iptable_security iptable_raw intel_rapl x86_pkg_temp_thermal coretemp snd_hda_codec_hdmi snd_hda_codec_realtek arc4 kvm_intel snd_hda_codec_generic ath9k kvm snd_hda_intel snd_hda_controller ath9k_common snd_hda_codec asus_nb_wmi ath9k_hw asus_wmi sparse_keymap snd_hwdep iTCO_wdt
 iTCO_vendor_support snd_seq crct10dif_pclmul snd_seq_device ath crc32_pclmul ath3k crc32c_intel mac80211 btusb snd_pcm ghash_clmulni_intel bluetooth uvcvideo videobuf2_vmalloc videobuf2_core cfg80211 snd_timer videobuf2_memops serio_raw v4l2_common videodev i2c_i801 media mei_me snd mei lpc_ich rfkill mfd_core wmi shpchp soundcore nfsd auth_rpcgss nfs_acl lockd grace binfmt_misc sunrpc i915 i2c_algo_bit drm_kms_helper drm atl1c video
CPU: 1 PID: 50 Comm: kswapd0 Not tainted 3.18.7-200.fc21.x86_64 #1
Hardware name: ASUSTeK Computer Inc. K54C/K54C, BIOS K54C.210 10/23/2012
 0000000000000000 00000000189a3fbf ffff8801b41df948 ffffffff8175e686
 0000000000000000 ffff8801b41df9a0 ffff8801b41df988 ffffffff810991d1
 ffff8801b41df950 ffff880036500068 0000000000100000 ffff880036500000
Call Trace:
 [<ffffffff8175e686>] dump_stack+0x46/0x58
 [<ffffffff810991d1>] warn_slowpath_common+0x81/0xa0
 [<ffffffff81099245>] warn_slowpath_fmt+0x55/0x70
 [<ffffffffa00ee62c>] assert_device_not_suspended.isra.8+0x4c/0x60 [i915]
 [<ffffffffa00efc78>] gen6_write32+0x38/0xf0 [i915]
 [<ffffffffa00cd9be>] i915_gem_write_fence+0xde/0x5d0 [i915]
 [<ffffffffa00cdf4a>] i915_gem_object_update_fence+0x9a/0xd0 [i915]
 [<ffffffffa00ce014>] i915_gem_object_put_fence+0x94/0x120 [i915]
 [<ffffffffa00ce238>] i915_vma_unbind+0x198/0x210 [i915]
 [<ffffffffa00ce4d4>] i915_gem_shrink+0x224/0x330 [i915]
 [<ffffffffa00cee48>] i915_gem_shrinker_scan+0xb8/0xd0 [i915]
 [<ffffffff811aa489>] shrink_slab_node+0x129/0x2b0
 [<ffffffff811ac2ab>] shrink_slab+0x8b/0x170
 [<ffffffff811af972>] kswapd_shrink_zone+0x152/0x210
 [<ffffffff811b03ca>] kswapd+0x4fa/0x8d0
 [<ffffffff811afed0>] ? mem_cgroup_shrink_node_zone+0x170/0x170
 [<ffffffff810b801a>] kthread+0xea/0x100
 [<ffffffff810b7f30>] ? kthread_create_on_node+0x1b0/0x1b0
 [<ffffffff8176537c>] ret_from_fork+0x7c/0xb0
 [<ffffffff810b7f30>] ? kthread_create_on_node+0x1b0/0x1b0