[SOLVED] System hangs, cannot start new processes

[foomaster]

Maybe someone runs into the same problem:

On my Shuttle SG41J1 with a Core 2 Duo E7500 the system freezes about a minute
after booting is finished. All running processes continue to work (almost) normally,
but when starting a new process, the system just hangs (no Ctrl-C, or anything else
works).

In the BIOS "Multi-Processing", "SpeedStep" and "C-State" are enabled.
When disabling all 3 options, the system runs normally…

The problem is Shuttle's buggy ACPI implementation, which can be worked around
by adding this sysctl:

kern.timecounter.hardware=HPET

Have fun (and don't buy Shuttle)!