<div dir="ltr"><div dir="ltr">On Fri, Jan 27, 2023 at 4:06 PM Gary Buhrmaster <<a href="mailto:gary.buhrmaster@gmail.com">gary.buhrmaster@gmail.com</a>> wrote:<br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On Fri, Jan 27, 2023 at 4:58 PM George Bingham <<a href="mailto:georgeb1962@gmail.com" target="_blank">georgeb1962@gmail.com</a>> wrote:<br>
<br>
>> * What is your distro/version?<br>
><br>
><br>
> Ubuntu 22.04, 5.15.0-58-generic<br>
<br>
Are you using an AMD Renior/Cezanne system?<br>
There is a kernel patch that fixes a specific issue<br>
with those systems and IOMMU for some core<br>
media tuners that even calls out MythTV as an<br>
impacted app and first identified on a 5.15 kernel<br>
(other generations of related implementations<br>
might also be impacted). Looks like it might<br>
need a (very) recent kernel to fix (the patch did<br>
not go into mainline until August of 2022, which<br>
would likely mean 6.0.x), although it might have<br>
gotten backported in some distros.<br>
<br>
In any case, I suspect that upstream will require<br>
you to test with a recent kernel before accepting<br>
a bug report.<br><br></blockquote><div><br></div><div>Thanks,</div><div><br></div><div>No, I'm running on an older HP Z210 workstation, it has an i7 and 16Gb ram. </div><div><br></div><div>I was trying to enable IOMMU so that I could devote an old GPU to running a windows VM. </div><div><br></div><div>I know I can run windows without giving it this gpu, but that'd be useless for my use case. </div><div><br></div><div>Darn, because until about a month ago I was still using this old GPU, and I had to keep my older ubuntu kernel because newer ones didn't support it. I was happy to update to the latest of everything when I got the new GPU... (well, latest ubuntu and latest release of MythTV).</div><div><br></div><div>Maybe I could run the backend in a VM? I've heard of folks doing that, but don't know what the pros and cons would be. </div><div><br></div><div>If anyone has run the backend in a VM I would be interested in their setup and any problems they encountered.</div><div><br></div><div>Will look into updating the kernel.... Not glued to ubuntu either, maybe it's time to look at arch or rh or something that'll give me more bleeding edge.</div><div><br></div><div>George</div></div></div>