<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 - laptop display blinks with kernel 4.6.0 (regression)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=96277">96277</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>laptop display blinks with kernel 4.6.0 (regression)
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>major
</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>freedesktop@cboltz.de
</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, tiwai@suse.de
</td>
</tr></table>
<p>
<div>
<pre>I'm using openSUSE Tumbleweed (rolling release) and the kernel from
Kernel:Stable (actually with two small AppArmor patches on top) so I already
have kernel 4.6.0 instead of the 4.5.4 kernel in Tumbleweed.
uname -r: 4.6.0-4.gaf7ce24-default
uname -m: x86_64
I'm using a laptop (Tuxedo Book BC1703 with i7-4710MQ CPU) with intel graphics
and two screens (laptop display + external screen via HDMI), but also see this
bug when the external screen is disconnected.
Kernel 4.6.0 causes the laptop screen to blink / flicker as soon as X starts
(both login manager and in KDE) which makes the laptop display unusable and
hurts in the eyes. This blinking is also reproducable with "X -retro".
I can "fix" this by booting 4.5.4, so this is clearly a regression in 4.6.0.
Also, booting kernel 4.6.0 with i915.enable_psr=0 stops the blinking.
Reproducable: always (the blinking with 4.6.0 without boot parameters, and also
the non-blinking with i915.enable_psr=0 or kernel 4.5.4)
I initially reported this bug on
<a href="https://bugzilla.opensuse.org/show_bug.cgi?id=981346">https://bugzilla.opensuse.org/show_bug.cgi?id=981346</a>
You can find logs (dmesg with drm.debug=0x0e), hardware details and some other
details there.
If you need more information, just ask ;-)</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>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>