Thanks for the info about the Translation Lookup Buffer (TLB) issue.

Driver version 390.144

Tried PhonenixMiner 5.4c from the other thread, tried -straps 2 but didnt work. Still needed ethlargement and got to 37 Mh/s

Using  nvidia-settings  version 390.144

Tried the latest driver a while ago and got really poor hashrate so stuck with what works..

maybe its time to try 4XX?

debian apt has 460.91.03 as latest