This bug has been copied from bug #580945 and has been proposed
to be backported to 5.5 z-stream (EUS).
Technical note added. If any revisions are required, please edit the "Technical Notes" field
accordingly. All revisions will be proofread by the Engineering Content Services team.
Due to the missing HLT (halt) instruction emulation in the VMXAssist real-mode emulator, certain versions of the SYSLINUX boot loader could have caused the guest operating system (domU) to stop responding. With this update, the HLT instruction emulation has been added, and all versions of SYSLINUX now boot properly.
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on therefore solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.