[libvirt] strange bug

[Farkas Levente]

hi,
this strange bug always happened with me on centos-5 with virt-manager.
our setup:
- host:
  - Intel(R) Core(TM)2 Quad CPU Q6600  @ 2.40GHz
  - Intel S3000AHV
  - 8GB RAM
  - CentOS-5.2
  - kernel-2.6.18-92.1.22.el5 x86_64 64bit
- guest-1:
  - CentOS-5.2 - 4 vcpu
  - kernel-2.6.18-92.1.22.el5 i386 32bit
- guest-2:
  - CentOS-5.2 - 4 vcpu
  - kernel-2.6.18-92.1.22.el5 x86_64 64bit
- guest-3:
  - Mandrake-9 - 1 vcpu
  - kernel-2.4.19.16mdk-1-1mdk 32bit
- guest-4:
  - Mandrake-10 - 1 vcpu
  - kernel-2.6.14.2-p4-smp 32bit
- guest-5:
  - Windows XP Professional 32bit - 2 vcpu
- guest-7:
  - Fedora-9 - 4 vcpu
  - kernel-2.6.25.14-108.fc9.i686

if i restart libvirt i can start as the first guest the
guest-4/mandrake-10 but if i start any of the other guest i no longer
able to start guest-4.
now the most strange thing happened with guest-7 (fedora-9).
i use these packages build myself:
http://www.lfarkas.org/linux/packages/centos/5/
libvirt-0.6.0-1.x86_64.rpm
libvirt-python-0.6.0-1.x86_64.rpm
virt-manager-0.6.1-1.x86_64.rpm
python-virtinst-0.400.1-1.noarch.rpm
kvm-83-1.x86_64.rpm
and what've got from virt-manager is not too useful for me:
------------------------------------
Traceback (most recent call last):
  File "/usr/share/virt-manager/virtManager/engine.py", line 498, in
run_domain
    vm.startup()
  File "/usr/share/virt-manager/virtManager/domain.py", line 508, in startup
    self.vm.create()
  File "/usr/lib64/python2.4/site-packages/libvirt.py", line 287, in create
    if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
libvirtError: internal error unable to start guest:
------------------------------------
is there any way to find the reason?
thanks.

-- 
  Levente                               "Si vis pacem para bellum!"