@Martin, I bisected my problem down to

commit 8bf095f8b62c5fdfe55a8c95be775ea62be7bc10
Author: Kees Cook <k...@ubuntu.com>
Date:   Sun Oct 18 09:16:44 2009 -0700

    UBUNTU: SAUCE: [x86] fix report of cs-limit nx-emulation
    BugLink: http://bugs.launchpad.net/bugs/454285

which does have only effect for i386 non-pae kernels, in which case the
system accidentally assumes it has NX capabilities. I will update the
other bug accordingly.

@Simon, to check whether you are affected the same: if you got a cpu
which has no nx mentioned in cat /proc/cpuinfo but claims "NX (Execute
Disable) protection: active" in dmesg, this is wrong. You might want to
try the quick test kernel I put to
http://people.canonical.com/~smb/bug464552. If that helps we can put
this bug into "verification done".

-- 
suspend_test_finish warning triggers too easily, increase timeout to match 
mainline times
https://bugs.launchpad.net/bugs/464552
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