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This bug has been copied from bug #644896 and has been proposed
to be backported to 6.0 z-stream (EUS).

in kernel-2.6.32-71.7.1.el6

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.

http://rhn.redhat.com/errata/RHSA-2010-0842.html

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When booting the latest Red Hat Enterprise Linux 6 kernel (-78.el6), the system hanged shortly after the booting. Access to the file system died and the console started outputting soft lockup messages from the TTM code. With this update, the aforementioned behavior no longer occurs and the system boots as expected.