Serge,

sorry for the late answer, I wasn't subscribed to this bug before, I'll
answer more quickly in the future.

As for NFS - no NFS on this machine, and no console.log either. It seems
I was confusingly brief in my comment, I wasn't replying to Mandar
really, but to the original bug report.

Adding some context... Ubuntu 11.10, running Xubuntu and disk
encryption, quite standard otherwise.

I encountered this bug when trying to install windows using the command

virt-install --name winxp --ram 1024 --vcpus=1 --disk path=/dev/mapper
/wdgreen-win1 --os-type=windows --os-variant=winxp
--cdrom=/media/dumptemp/winxp_orig_sp2.img

which failed very soon. Don't have the original error message anymore,
but it was the "chardev: opening backend "pty" failed" one as far as I
remember.

I tried the things suggested in the comments of this bug with apparmor,
but was unable to get rid of apparmor "DENIED" messages referring to
libvirt. I was reluctant to simply reboot because according to some
comments this makes the problem disappear (temporarily) without any
other action, and I prefer to fix it for good. Running out of time, I
finally booted with 'apparmor=0' which helped.

I'll reboot without 'apparmor=0' to see if the problem reappears. I'm
happy to try any other suggestions you might have to get rid of the
apparmor error messages in case the problem reappears, now that I have
some time to experiment.

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https://bugs.launchpad.net/bugs/632696

Title:
  libvirt won't start a VM with serial or console

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