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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>
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<a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [IVB regression] Screen corruption since Kernel due to DMAR + stolen"
href="https://bugs.freedesktop.org/show_bug.cgi?id=68535">bug 68535</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>NEEDINFO
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<td>NEW
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<td style="text-align:right;">Summary</td>
<td>[IVB regression] Screen corruption since Kernel 3.9 (+ 3.10) with HD 4000 on H77 Board HDMI to DVI
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<td>[IVB regression] Screen corruption since Kernel due to DMAR + stolen
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [IVB regression] Screen corruption since Kernel due to DMAR + stolen"
href="https://bugs.freedesktop.org/show_bug.cgi?id=68535#c20">Comment # 20</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [IVB regression] Screen corruption since Kernel due to DMAR + stolen"
href="https://bugs.freedesktop.org/show_bug.cgi?id=68535">bug 68535</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>Somewhat unsurprisingly dmar/iommmu is the culprit again ...
No idea what exactly goes wrong, but if the IOMMU is supposed to set up an
identiy map for the stolen range for the gfx then that doesn't work out:
[ 0.464905] IOMMU: Setting identity map for device 0000:00:02.0 [0xdf800000
- 0xdf9fffff]</pre>
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