Compaq Presario 701EA. Sometimes, but not every time, resume after hibernation fails, and the laptop just continues rebooting normally instead. From dmesg (I'll also attach the whole thing for completeness):
[4294678.393000] Attempting manual resume
[4294678.409000] Stopping tasks: =========|
[4294678.409000] Shrinking memory... done (0 pages freed)
[4294678.456000] Loading image metadata ... done (29 pages loaded)
[4294679.475000] busybox: page allocation failure. order:0, mode:0x8020
[4294679.475000] [<c0144a3e>] __alloc_pages+0x1ee/0x2e0
Other times it resumes, but crashes hard once I touch a key to wake the screen that otherwise would stay black. This might be a unrelated issue though - I suspect something with power-manager kicking in to turn off screen or something because this happens more often when I resume after a long time hibernation. If I resume shortly after having hibernated, I rather get the busybox problem.
Search for "busybox" to see the interesting part, including a backtrace.