[ACPI] Reboot on shutdown with USB 2.0

[Michael M. <mm...@as...>]

Hi,

I'm having a strange problem regarding ACPI and USB 2.0 devices 
(External CD-Rom, Jaz drive, etc).  Using 2.4.21-pre5 with the latest 
patch if I issue:

shutdown -h now

The machine shuts off, but half a second later the power comes back on. 
 If I unload the echi driver module, the machine shuts off normally.

Any thoughts on what would cause that kind of behavior?

Thanks!

Mike Madore