<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body>
<p>
<div>
<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Flickering Screen on Dell XPS13 9350"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94593#c29">Comment # 29</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - Flickering Screen on Dell XPS13 9350"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94593">bug 94593</a>
from <span class="vcard"><a class="email" href="mailto:peteryuchuang@gmail.com" title="Peter Y. Chuang <peteryuchuang@gmail.com>"> <span class="fn">Peter Y. Chuang</span></a>
</span></b>
<pre>(In reply to thomas bonfort from <a href="show_bug.cgi?id=94593#c26">comment #26</a>)
<span class="quote">> >what graphical environment you use
> KDE plasma
> >do you have an external monitor attached?
> No
> >Is there anything special that triggers the flickering? something like: "it starts flickering when having more than one monitor I try to move the cursor to the external one"
> No special trigger. First happens between 30secs and 5 minutes after boot,
> then by salves of ~3-10 flickers separated by a few seconds, followed by a
> few minutes with no flickering. Flickers seem to happen essentially when the
> machine is more or less idling.</span >
I believe I am having the same problem. I am on XPS 13 9350 too, and now on
4.6-rc3 kernel. And yes the flickers do tend to occur when the machine is kind
of idling.
My suspicion is that it has something to do with RC6. When I change the
i915.enable_rc6 parameter from 7 to 0, the flickering seems to go away. The
problem is, of course, disabling RC6 will drain battery a lot faster.
PS. I notice that even with i915.enable_rc6=7, the GPU never goes to RC6p and
RC6pp. Is that not supported on Skylake yet?</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>