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<body><span class="vcard"><a class="email" href="mailto:awilliam@redhat.com" title="Adam Williamson <awilliam@redhat.com>"> <span class="fn">Adam Williamson</span></a>
</span> changed
<a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED --- - [BYT] Modesetting on Dell Venue 8 Pro (Bay Trail) produces garbled output (3.11, 3.12) or blank screen (3.13)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=71977">bug 71977</a>
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<table border="1" cellspacing="0" cellpadding="8">
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<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>RESOLVED
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<td>REOPENED
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<td style="text-align:right;">Resolution</td>
<td>FIXED
</td>
<td>---
</td>
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<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED --- - [BYT] Modesetting on Dell Venue 8 Pro (Bay Trail) produces garbled output (3.11, 3.12) or blank screen (3.13)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=71977#c15">Comment # 15</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED --- - [BYT] Modesetting on Dell Venue 8 Pro (Bay Trail) produces garbled output (3.11, 3.12) or blank screen (3.13)"
href="https://bugs.freedesktop.org/show_bug.cgi?id=71977">bug 71977</a>
from <span class="vcard"><a class="email" href="mailto:awilliam@redhat.com" title="Adam Williamson <awilliam@redhat.com>"> <span class="fn">Adam Williamson</span></a>
</span></b>
<pre>Hrm. Now I'm not 100% sure this is actually fixed. I think instead another bug
may have showed up and messed with us:
<a href="https://bugzilla.kernel.org/show_bug.cgi?id=68291">https://bugzilla.kernel.org/show_bug.cgi?id=68291</a>
whenever I started getting the Baytrail pinctrl driver enabled in my kernel
builds - which unfortunately I'm not keeping really strict records about :( -
that bug started happening to me. It's a crash early in boot when initializing
the graphics hardware; once that's happened, I think modesetting becomes a dead
letter.
Now we've figured out a fix/workaround for that bug...I'm back to KMS producing
a black screen :(
That is, with a 3.13rc8 kernel and the patches for
<a href="https://bugzilla.kernel.org/show_bug.cgi?id=68291">https://bugzilla.kernel.org/show_bug.cgi?id=68291</a> and
<a href="https://bugzilla.kernel.org/show_bug.cgi?id=67911">https://bugzilla.kernel.org/show_bug.cgi?id=67911</a> applied, I get a blank screen
when KMS kicks in. Booting with nomodeset is successful.
The two patches we thought fixed this - "Check VBT for eDP ports on VLV" and
"Simplify DP vs. eDP detection" - were merged into Linus' tree on 2013-11-28,
so I'm pretty sure they ought to be in rc8, right?</pre>
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