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<body><span class="vcard"><a class="email" href="mailto:daniel@ffwll.ch" title="Daniel Vetter <daniel@ffwll.ch>"> <span class="fn">Daniel Vetter</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WONTFIX - [i945GM] Just black screen and mouse cursor with `i915.fastboot=1`"
href="https://bugs.freedesktop.org/show_bug.cgi?id=84682">bug 84682</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>WONTFIX
</td>
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<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WONTFIX - [i945GM] Just black screen and mouse cursor with `i915.fastboot=1`"
href="https://bugs.freedesktop.org/show_bug.cgi?id=84682#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WONTFIX - [i945GM] Just black screen and mouse cursor with `i915.fastboot=1`"
href="https://bugs.freedesktop.org/show_bug.cgi?id=84682">bug 84682</a>
from <span class="vcard"><a class="email" href="mailto:daniel@ffwll.ch" title="Daniel Vetter <daniel@ffwll.ch>"> <span class="fn">Daniel Vetter</span></a>
</span></b>
<pre>commit 382dbe16b7b6b88ad064833d330f95828dbb4d7e
Author: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
Date: Tue Nov 4 14:48:02 2014 +0100
drm/i915: Mark fastboot as unsafe
Fastboot in its current incarnation assumes that the pfit isn't
relevatn for the state and that it can be disabled without restarting
the crtc. Unfortunately that's not the case on gen2/3 - it upsets the
hw and results in a black screen.
Worse, the way the current fastboot hack is structure we can't detect
and work around this in the code, since the fastboot smashes the
adjusted mode into crtc->mode. Which means the higher levels can't
correctly figure out that this is a lie and act accordingly.
Since fastboot is just a tech demo let's mark the module option as
experimental and close the coresponding reports as wontfix.
Bugzilla: <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED WONTFIX - [i945GM] Just black screen and mouse cursor with `i915.fastboot=1`"
href="show_bug.cgi?id=84682">https://bugs.freedesktop.org/show_bug.cgi?id=84682</a>
Signed-off-by: Daniel Vetter <<a href="mailto:daniel.vetter@intel.com">daniel.vetter@intel.com</a>>
We have a long-term plan to fix fastboot and properly integrate it and enable
it by default. That should stop gen2/3 from falling over, too.</pre>
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