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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Major audio-video sync and audio dropout problems when using Intel HDMI audio"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94804#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Major audio-video sync and audio dropout problems when using Intel HDMI audio"
href="https://bugs.freedesktop.org/show_bug.cgi?id=94804">bug 94804</a>
from <span class="vcard"><a class="email" href="mailto:patrakov@gmail.com" title="Alexander E. Patrakov <patrakov@gmail.com>"> <span class="fn">Alexander E. Patrakov</span></a>
</span></b>
<pre>Haswell HDMI audio users are affected by a longstanding kernel IOMMU bug:
<a href="https://bugzilla.kernel.org/show_bug.cgi?id=60769">https://bugzilla.kernel.org/show_bug.cgi?id=60769</a> . To make sure that your
report is not a duplicate, please add the following kernel command line option
and reboot:
intel_iommu=on,igfx_off
If that alone doesn't help, please try:
intel_iommu=on,igfx_off snd_hda_intel.align_buffer_size=1</pre>
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