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<base href="https://bugs.freedesktop.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - suspend/resume time from suspend-to-freeze/mem is high for VGA compatible controller"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90892">90892</a>
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<th>Summary</th>
<td>suspend/resume time from suspend-to-freeze/mem is high for VGA compatible controller
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>major
</td>
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<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>DRM/Intel
</td>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>yu.c.chen@intel.com
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>==System Environment==
--------------------------
platforms: skylake-y
cpu: C0 stepping
pch: B0 stepping
BIOS: V84
==kernel==
--------------------------
Ubuntu 14.04 LTS 64 bits
mainline 4.1-rc6
==Bug detailed description==
-----------------------------
suspend/resume time for 0000:00:02.0+ is 200ms+,
$ lspci
00:02.0 VGA compatible controller: Intel Corporation Device 191e (rev 02)
log:
[ 746.760346] call 0000:00:02.0+ returned 0 after 280934 usecs
...
[ 747.309040] PM: suspend of devices complete after 845.974 msecs
...
[ 747.391298] PM: noirq suspend of devices complete after 61.672 msecs
[ 747.391306] PM: suspend-to-idle
[ 754.542631] PM: resume from suspend-to-idle
...
[ 754.912154] call 0000:00:02.0+ returned 0 after 261735 usecs
...
[ 759.737839] PM: resume of devices complete after 5092.997 msecs
[ 759.743245] PM: Finishing wakeup.
[ 759.743248] Restarting tasks ... done.
==Reproduce steps==
----------------------------
1. echo mem > /sys/power/state
2. Resume by pressing power button or rtcwake
I also used the opensource tool SuspendResume to capture the
time during suspend/resume, and please find attached the ftrace/dmesg together
with a graphic view for these drivers.
==Expect result==
suspend/resume time drops to less than 50ms, or is this normal to cost 200ms on
SKLAKE-Y?
Thanks
Best Regards,
Yu</pre>
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