<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<body>
<p>
<div>
<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [Haswell HD4400] Black screen switching to a VT"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90617#c13">Comment # 13</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [Haswell HD4400] Black screen switching to a VT"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90617">bug 90617</a>
from <span class="vcard"><a class="email" href="mailto:celeonar@gmail.com" title="Cesare Leonardi <celeonar@gmail.com>"> <span class="fn">Cesare Leonardi</span></a>
</span></b>
<pre>Premise: since when i've filed the bug, mesa was updated to 10.5.7, while
kernel, X server, X driver and DRM are at the same version.
Few days ago intel-gpu-tools 1.11 with "intel_watermark" entered Debian
unstable. As Ander requested, i've run that command before and during the black
screen but the output is identical (see attachments).
Instead adding i915.enable_ips=0 to kernel command line works and resolve the
problem for me.
Cesare.</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>