Unable to create a full VM with Xen and Virt-manager/Virt-install

[Laurent Léonard]

Binary package hint: virt-manager

After the disk image creation I get this :

Unable to complete install '<class 'libvirt.libvirtError'> virDomainCreateLinux() failed POST operation failed: (xend.err 'Device 768 (vbd) could not be connected. Failed to find an unused loop device')
Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/create.py", line 617, in do_install
    dom = guest.start_install(False, meter = meter)
  File "/usr/lib/python2.5/site-packages/virtinst/Guest.py", line 820, in start_install
  File "/usr/lib/python2.5/site-packages/virtinst/Guest.py", line 841, in _do_install
  File "/usr/lib/python2.5/site-packages/libvirt.py", line 833, in createLinux
    if ret is None:raise libvirtError('virDomainCreateLinux() failed', conn=self)
libvirtError: virDomainCreateLinux() failed POST operation failed: (xend.err 'Device 768 (vbd) could not be connected. Failed to find an unused loop device')
'

[Tessa (unit3)]

When I'm attempting to setup a VM on hardy, using the backported virt packages from intrepid, I can't get past the disk creation stage. I click repeatedly on the forward arrow in virt-manager, and it never advances the configuration wizard, and doesn't print anything to stdout. It's entirely possible it's a similar error causing the disk creation to fail and then stopping the process, but I can't seem to get any feedback that this is the case. Is there a way to get debugging logging out of virt-manager to verify this?

[Laurent Léonard (laurent-open-minds)]

This error appears in a dialog box, your error is probably different from this one (probably you will get this one after correcting your error). There is nothing on stdout/stderr because virt-manager it becomes a detached process. You can use the --no-fork option to avoid that, or use strace -p PID to check it.

[Marc Deslauriers (mdeslaur)]

Thanks for reporting this.
Do you still have this issue?
Is it reproducible with recent versions of Ubuntu, such as Karmic or Lucid?

[Laurent Léonard (laurent-open-minds)]

This issue is solved for a long time. You can close the bug report.