Suspend w/o resume on Zaurus (4.2 snapshot)

Dear all,

after a while of abstinence, I installed again OpenBSD on my
zaurus. To get SD 
support, I choose the snapshot. The machine identifies
itself as:

# uname -a
OpenBSD zaurus.kwerth.net 4.2 GENERIC#170 zaurus

My problem is now: if I suspend the machine (using the
On/Off button *or* via 
apm -S), it seems to suspend well, but I cannot re-activate
it. On/Off button is 
out of function. Log files show nothing.

Does anybody has an idea where to start debugging?

Any hint is very much appreciated.

Thanks and best regards,

   Torsten