[pulseaudio-tickets] [Bug 94804] Major audio-video sync and audio dropout problems when using Intel HDMI audio

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94804

--- Comment #2 from Alexander E. Patrakov <patrakov at gmail.com> ---
Haswell HDMI audio users are affected by a longstanding kernel IOMMU bug:
https://bugzilla.kernel.org/show_bug.cgi?id=60769 . 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

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