<html>
<head>
<base href="https://bugs.freedesktop.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - no idle pc3/pc6/pc7 starting in Linux 4.7 - Macbook Air"
href="https://bugs.freedesktop.org/show_bug.cgi?id=99340">99340</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>no idle pc3/pc6/pc7 starting in Linux 4.7 - Macbook Air
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>DRI git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>x86-64 (AMD64)
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>dcpurton@marshwiggle.net
</td>
</tr>
<tr>
<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>Created <span class=""><a href="attachment.cgi?id=128845" name="attach_128845" title="dmesg output for 4.10.0-rc3 drm-tip">attachment 128845</a> <a href="attachment.cgi?id=128845&action=edit" title="dmesg output for 4.10.0-rc3 drm-tip">[details]</a></span>
dmesg output for 4.10.0-rc3 drm-tip
Under Linux 4.6 my Macbook Air spends > 60% in pc7 state. From Linux 4.7 the
system only reaches pc2. Battery life suffers significantly because of this.
I previously reported this issue at
<a href="https://bugzilla.kernel.org/show_bug.cgi?id=177151">https://bugzilla.kernel.org/show_bug.cgi?id=177151</a> but after discussion was
told to go here.
I built drm-tip 9ea6a075c23ea914695d57944c0e74cff0c6bff4 and this still
exhibits the problem. I have attached dmesg with debug output for this build.
I have done a git bisect and the results are:
git checkout ed4a6a7ca853253f9b86f3005d76345482a71283~ works.
git checkout ed4a6a7ca853253f9b86f3005d76345482a71283 exhibits the problem.
I run Debian Testing and have installed OS X El Capitan 10.11.6 on the Mac
partition.
Model Name: MacBook Air (11-inch, Early 2014)
Model Identifier: MacBookAir6,1
Model Number: MD712X/B</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the assignee for the bug.</li>
<li>You are the QA Contact for the bug.</li>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>