It looks like this bug has been fixed upstream in kernel 2.6.35-rc4.
>From the changelog:
commit 890ffedc7c3e95595926379e28ad2e16e7d7c613
Author: Thomas Backlund
Date: Sat Jun 19 16:32:25 2010 +0300
x86: Fix rebooting on Dell Precision WorkStation T7400
Dell Precision WorkStation T7400 freezes on reboot unless
reboot=b is used.
Reference: https://qa.mandriva.com/show_bug.cgi?id=58017
Signed-off-by: Thomas Backlund
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar
A PPA of this kernel is available at http://kernel.ubuntu.com/~kernel-
ppa/mainline/
** Bug watch added: Mandriva Linux #58017
http://qa.mandriva.com/show_bug.cgi?id=58017
** Changed in: linux (Ubuntu)
Status: Triaged => Fix Committed
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Dell Precision WorkStation T7400 won't reboot w/ Ubuntu 9.04
https://bugs.launchpad.net/bugs/413028
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