In some cases, virtual machines based on Oracle Linux 5 do not boot when started. This can occur if you used the P2V utility to convert a physical host based on Oracle Linux 5 to a virtual machine and then imported that virtual machine to Oracle VM Manager.
Unbreakable Enterprise Kernel version kernel-uek-2.6.32-100.34.1
adds support for paravirtualized drivers in a HVM guest on
Oracle VM. Starting with this kernel version, the default is
to present only paravirtualized drivers when running in a hardware
virtualized guest. To run kernel-uek, including the drivers, fully
hardware virtualized, an additional kernel boot parameter
xen_emul_unplug=never
must be added to the boot
parameters in /etc/grub.conf
.
Workaround: Add the kernel boot parameter as follows:
kernel /vmlinuz-2.6.32-100.34.1.el5uek ro root=/dev/VolGroup00/LogVol00 xen_emul_unplug=never
Bug 22285006