grep kernel /var/log/messages of a boot suspend and try and wake.
grep_kernel_message_log.txt (text/plain), 136.18 KB, created by Daniel Rowe on 2012-05-19 08:07:33 UTC
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Creator: Daniel Rowe
Created: 2012-05-19 08:07:33 UTC
Size: 136.18 KB
Actions: View
Attachments on bug 821214: 585535 | 585536 | 585537