I'm seeing this too, with 2.6.20-12-lowlatency on a Thinkpad T30. (opensource ATI drivers for Radeon 7500, P4 @2Ghz, orinoco_pci wireless, e100 ethernet).
Hibernation used to work fine in edgy and in previous feisty kernels, though there had been a regression with hibernation+sound (vis. bug 80893). ** Summary changed: - IBM Thinkpad R60 does not hibernate + Some Thinkpads do not hibernate ** Tags added: feisty-regression -- Some Thinkpads do not hibernate https://launchpad.net/bugs/92461 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs