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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - [bdw-u iommu] DMAR error -> GPU hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89360#c46">Comment # 46</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - [bdw-u iommu] DMAR error -> GPU hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89360">bug 89360</a>
from <span class="vcard"><a class="email" href="mailto:klondike@klondike.es" title="klondike <klondike@klondike.es>"> <span class="fn">klondike</span></a>
</span></b>
<pre>(In reply to Mads from <a href="show_bug.cgi?id=89360#c45">comment #45</a>)
<span class="quote">> (In reply to klondike from <a href="show_bug.cgi?id=89360#c44">comment #44</a>)
> >
> > For me disabling the EFI framebuffer solved the issue so far so maybe other
> > reporters may want to test and see if that solves the issue for them too.
>
> I've neither had efifb nor fbsimple enabled on my XPS 15 9550, but I didn't
> get rid of this problem until I added "intel_iommu=igfx_off" to my bootargs.</span >
Interesting, it seems then that there is more than one different instance of
this bug then. Do you have any other FB or driver that interacts with the intel
card other than the Intel's modesetting one? The VGA console could be one such
driver.</pre>
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