After some more investigation it appeared that the machine resumes but it takes ABSURDLY long time (anywhere from 90sec to 8 minutes). There are some ACPI errors in dmesg - see the attachment for a dmesg log after a single STR-Resume.
** Attachment added: "dmesg.resumed" http://launchpadlibrarian.net/14209139/dmesg.resumed -- Kernel 2.6.24-17 - broken resume from suspend to RAM https://bugs.launchpad.net/bugs/226279 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs