Ubuntu-server VM won't boot after GPU passtrough

[Normand_Nadon]

Hello there!

First-off, I know that on the UNRAID side of things is okay as I have successfully created and managed a GPU passthrough on an Ubuntu 18.04 desktop VM, with GUI. (this VM is not running right now, don't worry).

 

GPU is an AMD RX580 4gb (Sapphire Nitro Plus)

 

I tried to do the same on an Ubuntu-server 16.04 VM but I get stuck every time...

1. Steps I have followed:
2. Create VM without GPU passthrough
3. Install Ubuntu-server 16.04 from VNC window
4. Configure and test ssh, works
5. Turn-off VM
6. Restart VM and test ssh for sanity check
7. Turn-off VM again
8. Activate gpu and audio Passthrough
9. Restart VM... Nothing... Can't ssh neither.
10. Reset video to vnc and audio to none, VM is still unresponsive.
11. Try different variant of reinstall and retry
12. Ask for help on UNRAID forum
13. Wait for response while I try a million different things and mess things up even more (in progress!)

 

What did I miss?

[Normand_Nadon]

FIX I found:
I did not get Ubuntu server to work with GPU pass through, but I tried with Ubuntu Desktop, stripped of its GUI components and now it works great... 

I will probably revisit this later to try again.