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<b><a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED --- - [PNV/ILK bisected]igt/drv_suspend/debugfs-reader fails and cost long time to execute"
href="https://bugs.freedesktop.org/show_bug.cgi?id=77717#c5">Comment # 5</a>
on <a class="bz_bug_link
bz_status_ASSIGNED "
title="ASSIGNED --- - [PNV/ILK bisected]igt/drv_suspend/debugfs-reader fails and cost long time to execute"
href="https://bugs.freedesktop.org/show_bug.cgi?id=77717">bug 77717</a>
from <span class="vcard"><a class="email" href="mailto:jinxianx.guo@intel.com" title="Guo Jinxian <jinxianx.guo@intel.com>"> <span class="fn">Guo Jinxian</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=77717#c2">comment #2</a>)
<span class="quote">> There is also a backtrace at boot in dmesg:
>
> [ 1.575212] WARNING: CPU: 0 PID: 1256 at
> drivers/gpu/drm/i915/intel_display.c:1151 ironlake_fdi_link_train+0x5d/0x343
> [i915]()
> [ 1.575213] plane A assertion failure (expected on, current off)
> [ 1.575215] Modules linked in: i915(+) video button drm_kms_helper drm
> [ 1.575217] CPU: 0 PID: 1256 Comm: udevd Not tainted
> 3.14.0_drm-intel-nightly_1e771b_20140421+ #1870
> [ 1.575218] Hardware name: Gigabyte Technology Co., Ltd.
> H55M-UD2H/H55M-UD2H, BIOS F4 12/02/2009
> [ 1.575220] 0000000000000000 0000000000000009 ffffffff81717233
> ffff880002ccf468
> [ 1.575220] ffffffff81035052 0000000000000003 ffffffffa0097758
> 0000000000000000
> [ 1.575221] ffff88010e530000 ffff880112f6b000 00000000000f0018
> 0000000000000000
> [ 1.575222] Call Trace:
>
> Where is the regression report for that?</span >
This CallTrace unable to reproduce on latest
-fixes(7f1950fbb989e8fc5463b307e062b4529d51c862)</pre>
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