Can anyone help me with a suspend-resume problem?

I have two identical ThinkPad laptops (7764CTO). One works fine. The other will not "hibernate" (suspend-to-disk) and "thaw" (restart after suspend-to-disk). The alternative "sleep" (suspend-to-ram) and "resume" (restart after suspend-to-ram) works fine.

I don't find any log contents (that make sense to me) to tell me:

  • Did suspend-to-disk reach successful completion? If not, what went wrong?
  • Did start-up successfully detect the need to restart-from-hibernate? If successful suspend, why did detection fail?
  • Did restart-from-hibernate fail its processing? What was going on at the time of failure?

I found postings about suspect modules and problem devices (where suspend-to-XXX matters) and made some progress, but the fact that one laptop works while one fails is driving me crazy.

Completely stumped.

  • 1
    Same partition layout on both? – mathepic Feb 21 '11 at 18:49

How big is your SWAP? For default hybernation you need at least 2xRAM of swapspace. You can configure your kernel to use a file-swap instead, but this is not standard and a bit harder to install

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  • I have a netbook with 2 GiB ram and 600 MiB swap. I hibernate regularly with absolutely no problem. I installed stock Ubuntu Netbook. – djeikyb Feb 21 '11 at 23:21
  • I didn't say it was impossible, but even the swapFaq (and the help while installing says: Ubuntu Desktop uses Swap to Hibernate (PC off, no power needed, program states saved). If Hibernation is important to you, have more swap space then ram + swap overflow. (via; help.ubuntu.com/community/SwapFaq ) – Nanne Feb 22 '11 at 7:02

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