virsh snapshot-create-as with quiesce option times out

[David Wells]

Hi all!

I'm still working on the live backup of a couple vm's and what happens 
most of the times es that when I execute virsh with the 
snapshot-create-as with the --quiesce option the process finishes with 
an error that reads
> error: Timed out during operation: cannot acquire state change lock

I tried turning up the debug level but found nothing that appears to be 
of interest and I can connect successfully to the qemu guest agent since 
the following command returns the correct value
> sudo /usr/sbin/virsh domfsinfo slackware-current
> Mountpoint Name     Type     Target
> -------------------------------------------------------------------
> /                                    vda1     ext4     vda

I also tried running the qemu-ga agent on the guest with debugging 
enabled and when I issue this last command I can see the agent talking 
to the host but when I issue the quiesce option the guest agent shows 
nothing at all.

Is this by any chance a known bug? Is there something obvious I'm 
missing? What else can I provide to help debug this issue?

Thanks in advance!
Best regards,
David Wells.