I am seeing this on 18.04 Linux 5.3.0-1020-azure VM. Sister VM on same kernel, same patch level, same host does not see the issue.
I isolated it to a Hyper-V integration service difference between the issue vm and it's non-affect sibling. The issue reliably appears and goes away if "data exchange services" under "integration services" are disabled or re-enabled on the VM. Data Exchange disabled produces the issue.
I am seeing this on 18.04 Linux 5.3.0-1020-azure VM. Sister VM on same kernel, same patch level, same host does not see the issue.
I isolated it to a Hyper-V integration service difference between the issue vm and it's non-affect sibling. The issue reliably appears and goes away if "data exchange services" under "integration services" are disabled or re-enabled on the VM. Data Exchange disabled produces the issue.
Clue was found here https:/ /askubuntu. com/questions/ 996171/ hv-kvp- daemon- fails-in- ubuntu- 16-04-on- hyper-v