I’m using ESXi and had quite a similar experience for a while. I held back at version 1.29.xx as it was the only version I could reliably get transcoding. Is this how you all were/are, holding back to around that version? I’m only asking, as I managed to upgrade to the previous beta and documented what I did here. I did make sure to have my virtual graphics card fully disabled, so only 1 GPU was listed… As a follow up, I managed to upgrade to the latest public release just yesterday 
- and I re-enabled my virtual graphics card - and all is well :
Anywho 
I have no idea if this will help anyone? And looking at some of the posts, there’s people more knowledgeable than me on Ubuntu here 
