Comment 6 for bug 152664

I occurred here googling a bit. I have what I regard as a related problem.

I upgraded my release to Gutsy, and then I tried to install ubuntu-server-xen for the first time on this machine.

The installation aborted with synaptic complaining that

          Depends: libc6-xen but it is not going to be installed

Then I tried to install libc6-xen first, which failed with

         PreDepends: libc6 (=2.6.1-1ubuntu9) but 2.6.1-1ubuntu10 is to be installed

libc6-xen is optimized for xen hypervisor and used by xen instead of the standard libc6.

The problem then seems to be that libc6-xen has not been updated.