[USB passthrough Trust GXT 232 Microphone crashes Ubuntu VM]

Tnx! I will give that a try and post back if that worked.
My previous post about the Windows VM working was also not entirely true, it booted but ended up breaking when actually trying to use the microphone for a longer time.
I will have a look at this this weekend I think

[USB passthrough Trust GXT 232 Microphone crashes Ubuntu VM]

For some reason it does work in my Windows VM. So parhaps its something with Linux VM's specifically.

[USB passthrough Trust GXT 232 Microphone crashes Ubuntu VM]

I have a USB microphone a Trust GXT 232. Whenever I try to add this USB as a passed through USB the config saves.
When I then start my Ubuntu VM I get the following error after about 15 seconds.
 

qemu-system-x86_64: hw/usb/host-libusb.c:838: usb_host_ep_update: Assertion `udev->altsetting[i] < conf->interface[i].num_altsetting' failed.
2021-11-11 07:57:49.628+0000: shutting down, reason=crashed

I have the following about the USB in my VM XML (i added it using the UI)
 

<hostdev mode='subsystem' type='usb' managed='no'>
  <source>
    <vendor id='0x145f'/>
    <product id='0x0254'/>
  </source>
  <address type='usb' bus='0' port='4'/>
</hostdev>

Does anyone have an idea what this error means and what I can change to get it to work?

[Black screen on Ubuntu 20.04 VM with GPU passthrough]

Quote

The physical disk has nvidia drivers in it and has the latest updates, along with Linuxmint updates

Well this put me on the right track. I have a Unraid server with a single GPU a MSI Geforce GT 710.

I was having trouble with a simular issue aswell. I tried to install a Ubuntu VM. The installation would go through, but after the installation it simply looked like it didn't work anymore. Black screen all the way. I tried every suggestion I could find.

Turns out... the installation was simply installing the wrong nvidia drivers...

Setting up the VM with my GPU passed through worked, after the install black screen. I changed my Graphics card in the VM to VNC. Logged in and installed the correct drivers using the following commands:
  sudo apt-get purge nvidia*
  sudo add-apt-repository ppa:graphics-drivers
  sudo apt-get update
  sudo apt-get install nvidia-470

Afterwards I shutdown the VM, changed the graphics card setting back to my GT 710 and voila everything works as a charm again.
This took me way to long to figure out...