VM's may not start or install after latest SLES 11 SP1 updates

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Environment

SUSE Linux Enterprise Server 11 Service Pack 1
XEN

Situation

After applying the lastest round of SLES 11 SP1 updates (specifically the kernel update) the following may occur:

Unable to install a new Virtual Machine (VM)
Previously working VM will not start
Error: 'Device [X] (vif) could not be connected. Hotplug scripts not working.'
Error regarding virtual block device not being available / found

Resolution

Apply kernel version 2.6.32.13-0.5 or later.

Additional Information

The problem was introduced in the 2.6.32.13-0.4 kernel. A deadlock condition can occur that will result in the unwanted behavior.

Disclaimer

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