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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [BYT] igt/pm_rpm/debugfs-read cause dmesg warn"
href="https://bugs.freedesktop.org/show_bug.cgi?id=88910#c3">Comment # 3</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [BYT] igt/pm_rpm/debugfs-read cause dmesg warn"
href="https://bugs.freedesktop.org/show_bug.cgi?id=88910">bug 88910</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>(In reply to Chris Wilson from <a href="show_bug.cgi?id=88910#c2">comment #2</a>)
<span class="quote">> Close, but the bisect is wrong... Can you look at why the bisect went wrong,
> reproduction here should have been 100%?</span >
I use this kernel commit run the same case 10 times, everytime I can get the
following error in dmesg:
root@x-byt06:~# dmesg -r | egrep "<[1-4]>" |grep drm
<3>[ 222.289443] [drm:vlv_check_no_gt_access [i915]] *ERROR* GT register
access while GT waking disabled
<3>[ 267.371300] [drm:vlv_check_no_gt_access [i915]] *ERROR* GT register
access while GT waking disabled
<3>[ 317.469940] [drm:vlv_check_no_gt_access [i915]] *ERROR* GT register
access while GT waking disabled
root@x-byt06:~# dmesg -r | egrep "<[1-4]>" |grep drm
<3>[ 317.469940] [drm:vlv_check_no_gt_access [i915]] *ERROR* GT register
access while GT waking disabled
<3>[ 370.552391] [drm:vlv_check_no_gt_access [i915]] *ERROR* GT register
access while GT waking disabled
root@x-byt06:~# dmesg |grep vlv_check_no_gt_access
[ 317.469940] [drm:vlv_check_no_gt_access [i915]] *ERROR* GT register access
while GT waking disabled
[ 370.552391] [drm:vlv_check_no_gt_access [i915]] *ERROR* GT register access
while GT waking disabled
[ 402.651940] [drm:vlv_check_no_gt_access [i915]] *ERROR* GT register access
while GT waking disabled
I noticed that the error message will disappear about every 1 minute.
On the other hand, I use git log --first-parent
f654449a28e9cce283d6e3ef22c31fe7d865dff5 and find out its parent commit:
737b1506037788f1e01b2a4c5795d4180b2e2e00.
I didn't see this issue on this commit.</pre>
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