<div dir="ltr"><div>If  igfx_off is  default, how / why is  it  on?<br></div><div>from<br></div><div><a href="https://www.kernel.org/doc/html/latest/admin-guide/kernel-parameters.html">https://www.kernel.org/doc/html/latest/admin-guide/kernel-parameters.html</a></div><div>"...<br></div><div><pre class="gmail-literal-block">intel_iommu=    [DMAR] Intel IOMMU driver (DMAR) option
                on
                        Enable intel iommu driver.
                off
                        Disable intel iommu driver.
                igfx_off [Default Off]
                        By default, gfx is mapped as normal device. If a gfx
                        device has a dedicated DMAR unit, the DMAR unit is
                        bypassed by not enabling DMAR with this option. In
                        this case, gfx device will use physical address for
                        DMA.<br>...<br></pre></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sat, 3 Jul 2021 at 01:25, Bryan Cebuliak <<a href="mailto:bryan.cebuliak@gmail.com">bryan.cebuliak@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>more  possibly relevant IOMMU video audio  and  passthrough issue links:<br></div><div>Easy ACS kernel patch guide for Ubuntu 20.04</div><div><a href="https://www.youtube.com/watch?v=JBEzshbGPhQ" target="_blank">https://www.youtube.com/watch?v=JBEzshbGPhQ</a></div><div><br></div><div><a href="https://forum.level1techs.com/t/intel-graphics-hdmi-audio-fails-after-enabling-intel-iommu-on/168827" target="_blank">https://forum.level1techs.com/t/intel-graphics-hdmi-audio-fails-after-enabling-intel-iommu-on/168827</a></div><div><br></div>kvm-gpu-passthrough-on-debian-buster.md<div><a href="https://gist.github.com/davesilva/445276f9157e7cb3a4f6ed2fe852b340" target="_blank">https://gist.github.com/davesilva/445276f9157e7cb3a4f6ed2fe852b340</a></div><div><br></div><h2 id="gmail-m_2129140902636648391m_-1961845597171510168gmail-:1ds"></h2></div>
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