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I think this problem might be related to this one:

Failing to recover from hibernate

Basically, as soon as ive installed ubuntu, using the automatic partitioning, if i run gparted and look at my disk partitions, my swap space is displayed as unknown, with an exclamation mark next to it:

Error image

Ok, next step, i manually assign the 'unknown' section to be a swap partition, and attempt to hibernate. When i switch my system back on, it runs as described in the link above, failing to restore from hibernate. When i run gparted again after its restarted, the swap partition is back to 'unknown'. Any idea whats going on here?

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So if I understand correctly, everytime you restore from hibernation, then the swap partition becomes raw? – Manish Sinha Mar 24 '12 at 20:20
yep, every time i attempt to hibernate – richzilla Mar 24 '12 at 22:50
I am not sure why this is happening. The closest I could find was this on Unix StackExchange – Manish Sinha Mar 25 '12 at 11:09

If you've chosen to encrypt your user-directory during the installation, Ubuntu will automatically encrypt your swap. This could be the Problem in this case. You can check your /etc/fstab for the device that is mounted as swap. If it's something like /dev/mapper/cryptswap1 your swap is encrypted and hibernate can't work.

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Can you state whether there is a workaround for the OP? – hexafraction Aug 16 '12 at 15:01

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