<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Power Management Regression on SNB mobile GT2"
href="https://bugs.freedesktop.org/show_bug.cgi?id=68807">68807</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>chris@chris-wilson.co.uk
</td>
</tr>
<tr>
<th>Summary</th>
<td>Power Management Regression on SNB mobile GT2
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>nkalkhof@web.de
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>git
</td>
</tr>
<tr>
<th>Component</th>
<td>Driver/intel
</td>
</tr>
<tr>
<th>Product</th>
<td>xorg
</td>
</tr></table>
<p>
<div>
<pre>Hi All,
I've encountered a regression in power consumption on my SNB mobile GT2 using
the latest ~danvet/drm-intel-nightly branch. For example during vaapi playback
the power drain jumped from approx 11 Watts to 16 Watts. I've tried to reenable
power save state for all components using powertop without effect. I also
believe I've found the bad commit:
7499671cb211b34322085172c2fbb33ba87825eb drm/i915: tune the RC6 threshold for
stability.
It seems that it takes longer for the GPU to switch to a lower C state
resulting in a higher average power consumption.
Could someone take a look at it and confirm please?
Regards
Nic</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
</ul>
</body>
</html>