hyperthreading locks up sleeping threads

[OlafMeding at gmail.com]

Update

The problem turned out to be the BIOS of the PC we were using.  The
Python test program has been running fine for 5 days now (after we
upgraded the system BIOS) and is still running fine.

Sorry, I do not have any information as to what was fixed in the BIOS.
Also, I do not know exactly who made the motherboard or the BIOS.  I
will post another update if this information becomes available.

This was sure a strange bug!

Olaf