I had the same problem on my X200s:
Manufacturer: LENOVO
Product Name: 74705HG
Version: ThinkPad X200s
The test kernel fixes the problem for me:
Linux lure 2.6.35-26-generic #45~lp705845v201101271403 SMP Thu Jan 27
14:17:52 UTC 2011 x86_64 GNU/Linux
Before this test kernel, I have used the following workaround:
http://us.generation-nt.com/answer/regression-suspend-fails-because-tpm-modules-help-201235252.html
Also note, that similar problem was fixed in RedHat kernel (with similar
auto-detection fix) already in Nov 2010:
https://bugzilla.redhat.com/show_bug.cgi?id=644842
** Bug watch added: Red Hat Bugzilla #644842
https://bugzilla.redhat.com/show_bug.cgi?id=644842
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https://bugs.launchpad.net/bugs/705845
Title:
Suspend on Thinkpad X200s worked in 2.6.35-24-generic but no longer in
2.6.35-25-generic
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