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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [SKL]kms_universal_plane causes system hang"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=89100#c8">Comment # 8</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [SKL]kms_universal_plane causes system hang"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=89100">bug 89100</a>
              from <span class="vcard"><a class="email" href="mailto:hengx.ding@intel.com" title="Ding Heng <hengx.ding@intel.com>"> <span class="fn">Ding Heng</span></a>
</span></b>
        <pre>Created <span class=""><a href="attachment.cgi?id=114193" name="attach_114193" title="dmesg with nightly branch 20150310">attachment 114193</a> <a href="attachment.cgi?id=114193&action=edit" title="dmesg with nightly branch 20150310">[details]</a></span>
dmesg with nightly branch 20150310

root@x-skly03:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# dmesg -r | egrep
"<[1-4]>" |grep drm
<4>[  141.410057] WARNING: CPU: 0 PID: 5172 at
drivers/gpu/drm/i915/intel_dp.c:658 intel_dp_aux_ch+0xaa/0x57f [i915]()
<4>[  141.410062] Modules linked in: dm_mod snd_hda_codec_realtek
snd_hda_codec_generic ppdev snd_hda_intel snd_hda_controller i2c_i801 pcspkr
snd_hda_codec snd_hwdep snd_pcm snd_timer snd soundcore wmi battery parport_pc
parport ac acpi_cpufreq i915 button video drm_kms_helper drm
<4>[  141.410241]  [<ffffffffa00515db>] ? drm_dp_dpcd_access+0x5b/0xed
[drm_kms_helper]
<4>[  141.410250]  [<ffffffffa0051680>] ? drm_dp_dpcd_read+0x13/0x17
[drm_kms_helper]
<4>[  141.410336]  [<ffffffffa0051e88>] ?
drm_helper_probe_single_connector_modes_merge_bits+0xc4/0x395 [drm_kms_helper]
<4>[  141.410354]  [<ffffffffa000ef5d>] ? drm_mode_getconnector+0xda/0x2aa
[drm]
<4>[  141.410369]  [<ffffffffa00047d4>] ? drm_ioctl+0x344/0x3b3 [drm]
<4>[  141.410391]  [<ffffffffa000ee83>] ? drm_mode_getcrtc+0xfe/0xfe [drm]
<4>[  141.410405]  [<ffffffffa0003b60>] ? drm_gem_vm_close+0x2a/0x4b [drm]
root@x-skly03:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# dmesg -r | egrep
"<[1-4]>" |grep call
<4>[  141.410424]  [<ffffffff81799972>] ? system_call_fastpath+0x12/0x17</pre>
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