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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - random system freezes on broadwell-u gpu"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89360#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - random system freezes on broadwell-u gpu"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89360">bug 89360</a>
from <span class="vcard"><a class="email" href="mailto:code@stefanjunker.de" title="code@stefanjunker.de">code@stefanjunker.de</a>
</span></b>
<pre>Short version
---
adding 'intel_iommu=igfx_off' helped
Long version
---
I've tried many things to resolve this issue, from kernel reconfiguration to
installing mesa, libdrm, intel drivers from latest repository masters, which
all didn't help. I reverted back to the most recent releases of the packages.
>From an older forum entry somewhere on the webs I found that this could be
related to virtualization techologies and memory remapping, so I added the
following arguments to my kernel commandline: 'intel_iommu=igfx_off'
Ever since (about 10-15 hours of very active usage) I haven't had a single
freeze.
I still think this is not normal behavior, since turning off iommu for the GPU
can't be the right or necessary thing to do.</pre>
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