Some Linux operating system distributions install a Xen Linux kernel by default (such as RHEL 5, CentOS 5, Oracle Enterprise Linux and Fedora Core 7 and higher). In these cases, deselect the Virtualization option during the installation of these operating systems. Disabling the Virtualization option ensures that a supported kernel is installed.
If the guest operating system is already installed, select the right kernel from the GRUB prompt to boot into the non-virtualization kernel.
Alternatively, if you are familiar with editing the menu.lst file, you can edit the /boot/grub/menu.lst file to comment the Virtualization kernel from booting.
Note: Take a backup of menu.lst file before editing, In-appropriate edit may cause the OS to corrupt. For more information on how to edit boot options in menu.lst, see your Linux distribution documentation.
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