Comment 14 for bug 516684

Ive hit the same issue upgrading an Ubuntu 8.04 Xen VM to Lucid 10.04.

The host is running Centos 5.3 and I have a mix of Centos, Debian and Ubuntu VMs. The Debian VMs upgraded to Lenny without incident but It appears I can't run a paravirt Lucid VM on top of Centos.

If I try to boot with a Lucid kernel (2.6.24-21-xen) I get

libudev: udev_monitor_new_from_netlink: error getting socket: Invalid argument
[ 0.505931] wait-for-root[761]: segfault at 00000030 eip b7edef2b esp bfb99f50 error 4
Segmentation fault
chvt: can't open console
There appears to be one or more degraded LVM volumes, and your root device may
depend on the LVM volumes being online. One or more of the following LVM volumes
are degraded:
  read_urandom: /dev/urandom: open failed: No such file or directory
Gave up waiting for root device. Common problems:
 - Boot args (cat /proc/cmdline)
   - Check rootdelay= (did the system wait long enough?)
   - Check root= (did the system wait for the right device?)
 - Missing modules (cat /proc/modules; ls /dev)
chvt: can't open console
ALERT! /dev/disk/by-uuid/87fea4c2-db1f-4743-bab0-da95e5c8e594 does not exist. Dropping to a shell!

Anyone had better luck.