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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [bdw-u iommu] DMAR error -> GPU hang"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89360#c84">Comment # 84</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [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:corsac@debian.org" title="Yves-Alexis <corsac@debian.org>"> <span class="fn">Yves-Alexis</span></a>
</span></b>
<pre>(In reply to Jani Saarinen from <a href="show_bug.cgi?id=89360#c83">comment #83</a>)
<span class="quote">> Reporter, can you test with latest drm-tip that is now on 4.17.0-rc5</span >
I just tried and after a while (system docked with external screen configured,
and some vtswitch because lightdm) I had a freeze. Looking at kern.log I have:
May 17 18:01:22 scapa kernel: [14619.773523]
[drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe C FIFO underrun
May 17 18:01:25 scapa kernel: [14622.309074]
[drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe B FIFO underrun</pre>
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