Ideally, we'd want to bisect and fix the kernel itself to reliably
shutdown. yanking ahci sounds like a large hammer. Invalidating systemd
task, and pinging kernely people.
** Changed in: systemd (Ubuntu)
Status: Incomplete => Invalid
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https://bugs.launchpad.net/bugs/1777674
Title:
Ubuntu 18.04 hangs at "kvm: exiting hardware virtualization" on AMD
servers with DVD
Status in dellserver:
New
Status in linux package in Ubuntu:
Incomplete
Status in systemd package in Ubuntu:
Invalid
Status in linux source package in Bionic:
Incomplete
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.
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