This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1722702
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1722702
Title:
libvirt - vnc port selection regression with newer kernels
Status in libvirt package in Ubuntu:
Confirmed
Status in linux package in Ubuntu:
Incomplete
Bug description:
Bug appears in linux-image-4.11.x kernels on 16.04.3.
4.8.x and 4.10.x are okay.
When libvirtd is restarted on Kernel 4.11.0-x-generic or above , it
loses all information regarding existing port bindings and is unable
to correctly re-identify vnc ports that currently in use. libvirt
attempts to bind to an existing port and fails.
instance-000a6096.log:2017-10-09T01:42:16.017220Z
qemu-system-x86_64: -vnc 0.0.0.0:0: Failed to start VNC server: Failed to
listen on socket: Address already in use
Fairly certain this is the same bug reported, and patched in
kernel-4.13.4-200.fc26 for Fedora
https://bugzilla.redhat.com/show_bug.cgi?id=1432684
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