Most recent kernel where this bug did not occur: don't know Distribution: SuSE 10.0 Hardware Environment: Intel centrino Software Environment: 2.6.17-rc3 Problem Description: After S3 , reboot just hang.
The patch of using FADT reset register filed at http://bugzilla.kernel.org/show_bug.cgi?id=6655#c8 fixed my problem.
the patch referenced in comment #1 can not be applied because it does not credit the original author, and does not include x86_64 support.
Please re-open if this is still a problem in linux-2.6.22.stable or later.