[Bug 1777674] Re: Ubuntu 18.04 hangs at "kvm: exiting hardware virtualization" on AMD servers

[Sujith Pandel]

Update:
I was under the assumption that kvm/kvm_amd module was the suspect.
But I was wrong.
Reason - I tried performing '#modprobe -r kvm_amd kvm' before issuing '#systemctl reboot' in the reboot script and the system still halted with Ubuntu 18.04 kernel.

@jsalisbury -
I will keep it today and update you by tomorrow.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1777674

Title:
  Ubuntu 18.04 hangs at "kvm: exiting hardware virtualization" on AMD
  servers

Status in dellserver:
  New
Status in linux package in Ubuntu:
  Incomplete
Status in systemd package in Ubuntu:
  New
Status in linux source package in Bionic:
  Incomplete
Status in systemd source package in Bionic:
  New

Bug description:
  Ubuntu 18.04 hangs at "kvm: exiting hardware virtualization" on AMD
  servers when under graceful reboot stress for 12hrs.

  * This hand is observed only when Onboard SATA DVD Drive is connected.

  * Not seen with Ubuntu 16.04.4 (HWE kernel v4.13)

  * Seen with Ubuntu 18.04 (4.15.0-23-generic, 4.15.0-20-generic)

  Steps:
  Setup a DellEMC AMD server with Onboard DVD Drive, install Ubuntu 18.04 and start reboot stress
  After a few reboots, observe that the machine hangs at "kvm: exiting hardware virtualization" and does not proceed with reboot cycles.

  Only physical reset helps in continuing the reboot test.

To manage notifications about this bug go to:
https://bugs.launchpad.net/dellserver/+bug/1777674/+subscriptions