Additional info:
reporter:       libreport-2.1.4
WARNING: at drivers/gpu/drm/i915/intel_dp.c:2066 intel_dp_link_down+0x1b8/0x1f0 [i915]()
Hardware name: 4286CTO
Modules linked in: nls_utf8 usb_storage hidp fuse ebtable_nat xt_CHECKSUM bridge stp llc ipt_MASQUERADE nf_conntrack_netbios_ns nf_conntrack_broadcast ip6table_mangle ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 iptable_nat nf_nat_ipv4 nf_nat iptable_mangle nf_conntrack_ipv4 nf_defrag_ipv4 xt_conntrack nf_conntrack ebtable_filter ebtables ip6table_filter ip6_tables be2iscsi iscsi_boot_sysfs bnx2i cnic uio cxgb4i cxgb4 cxgb3i cxgb3 mdio libcxgbi ib_iser rdma_cm ib_addr iw_cm ib_cm ib_sa ib_mad ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi rfcomm bnep iTCO_wdt iTCO_vendor_support vfat fat acpi_cpufreq mperf coretemp microcode joydev usblp snd_hda_codec_hdmi i2c_i801 arc4 snd_hda_codec_conexant qmi_wwan iwldvm cdc_wdm snd_hda_intel usbnet mii mac80211 qcserial snd_hda_codec usb_wwan lpc_ich mfd_core snd_hwdep snd_seq snd_seq_device uvcvideo btusb videobuf2_vmalloc snd_pcm iwlwifi videobuf2_memops bluetooth videobuf2_core videodev media cfg80211 snd_page_alloc snd_timer mei thinkpad_acpi snd soundcore rfkill tpm_tis tpm tpm_bios vhost_net tun macvtap macvlan kvm_intel kvm binfmt_misc uinput dm_crypt mmc_block crc32_pclmul i915 crc32c_intel ghash_clmulni_intel i2c_algo_bit sdhci_pci sdhci drm_kms_helper mmc_core e1000e drm ptp i2c_core pps_core wmi video sunrpc
Pid: 86, comm: kworker/u:5 Not tainted 3.9.6-200.fc18.x86_64 #1
Call Trace:
 [<ffffffff8105ef85>] warn_slowpath_common+0x75/0xa0
 [<ffffffff8105efca>] warn_slowpath_null+0x1a/0x20
 [<ffffffffa01b9158>] intel_dp_link_down+0x1b8/0x1f0 [i915]
 [<ffffffffa01bc8d8>] intel_dp_check_link_status+0xb8/0x170 [i915]
 [<ffffffff8107b03d>] ? pwq_activate_delayed_work+0x3d/0x90
 [<ffffffffa01bc9a5>] intel_dp_hot_plug+0x15/0x20 [i915]
 [<ffffffffa01840ee>] i915_hotplug_work_func+0x9e/0xc0 [i915]
 [<ffffffff8107b623>] process_one_work+0x173/0x3c0
 [<ffffffff8107cf4f>] worker_thread+0x10f/0x390
 [<ffffffff8107ce40>] ? busy_worker_rebind_fn+0xb0/0xb0
 [<ffffffff81082af0>] kthread+0xc0/0xd0
 [<ffffffff81010000>] ? ftrace_define_fields_xen_mc_flush+0x20/0xb0
 [<ffffffff81082a30>] ? kthread_create_on_node+0x120/0x120
 [<ffffffff8166a52c>] ret_from_fork+0x7c/0xb0
 [<ffffffff81082a30>] ? kthread_create_on_node+0x120/0x120