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<base href="https://bugs.freedesktop.org/" />
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<th>Priority</th>
<td>medium
</td>
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [HSW ULT desktop mobile bisected] Slow resume time"
href="https://bugs.freedesktop.org/show_bug.cgi?id=65922">65922</a>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>Summary</th>
<td>[HSW ULT desktop mobile bisected] Slow resume time
</td>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
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<th>Severity</th>
<td>major
</td>
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<th>Classification</th>
<td>Unclassified
</td>
</tr>
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<th>OS</th>
<td>All
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<th>Reporter</th>
<td>cancan.feng@intel.com
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<th>Hardware</th>
<td>Other
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Component</th>
<td>DRM/Intel
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<th>Product</th>
<td>DRI
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<pre>System Environment:
--------------------------
Platform: Haswell ULT, Haswell desktop, Haswell mobile
Kernel: (drm-intel-next-queued)04c23c6203954cc38a34c86b4dd0686a1b1a53de
Author: Paulo Zanoni <<a href="mailto:paulo.r.zanoni@intel.com">paulo.r.zanoni@intel.com</a>>
Date: Wed Jun 12 17:27:30 2013 -0300
Bug detailed description:
-------------------------
I did suspend-resume cycle of S3 on latest drm-intel-next-queued kernel, and
found that resume time slower than expectation. This happens on all HSW
platforms, and I have bisected it on HSW desktop, and it's applicable for the
other two platforms.
Bisect info:
-------------------------
24576d23976746cb52e7700c4cadbf4bc1bc3472 is the first bad commit
commit 24576d23976746cb52e7700c4cadbf4bc1bc3472
Author: Jesse Barnes <<a href="mailto:jbarnes@virtuousgeek.org">jbarnes@virtuousgeek.org</a>>
Date: Tue Mar 26 09:25:45 2013 -0700
drm/i915: enable VT switchless resume v3
With the other bits in place, we can do this safely.
v2: disable backlight on suspend to prevent premature enablement on resume
v3: disable CRTCs on suspend to allow RTD3 (Kristen)
Signed-off-by: Jesse Barnes <<a href="mailto:jbarnes@virtuousgeek.org">jbarnes@virtuousgeek.org</a>>
Reviewed-by: Rodrigo Vivi <<a href="mailto:rodrigo.vivi@gmail.com">rodrigo.vivi@gmail.com</a>>
Signed-off-by: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
Following table shows the bad value(from first bad commit) compared with good
value(from first-bad-commit's father commit) of HSW desktop:
resume time:
-------------------------------------
Display ports eDP HDMI DP
Bad 710.256msecs 262.942msecs 190.676msecs
Good 52.750msecs 56.695msecs 67.484msecs</pre>
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