Xen: libvirt.libvirtError: An error occurred, but the cause is unknown

[Peter Krempa]

On Wed, Apr 07, 2021 at 08:14:10 +0000, Mathieu Tarral wrote:
> Hi,
> 
> I'm facing a strange issue with libvirt and the Xen driver.
> 
> Whenever I try to define or start a domain, I always get this error:
> "libvirt.libvirtError: An error occurred, but the cause is unknown" (in Python virt-manager interface)
> 
> Which is not very helpful.
> Trying to use virsh directly leads to the same error message:
> 
> virsh # start win10_xen
> error: Failed to start domain win10_xen
> error: An error occurred, but the cause is unknown

This is reported when we fail to set an error message

> 
> I checked /var/log/libvirt/libxl/libxl-driver.log, but the log file is empty.

Please try enabling full debug logging, it may at least show what the
last thing we were doing is.


https://www.libvirt.org/kbase/debuglogs.html#persistent-setting