I cvsupped my source to RELENG_6 yesterday, built the world and kernel and rebooted into the new kernel in single user mode to test it out. Boot messages had a series of messages such as: acpi: bad write to port 0xcf8 (32), val 0x80003884 acpi: bad read from port 0xcfc (32) These messages do not occur with my present system, which is 6.1-STABLE from May 9th, 2006. Some googling seems to hint that MFC of src/sys/dev/acpica/Osd/OsdHardware.c as of May 11, 2006 *may* have something to do with it. But I am not a developer enough to understand whether these messages are merely cosmetic or should something be done to fix them. The machine where this is occurring is based on Chaintech 7AJA/0 motherboard with AMD Duron 800 MHz CPU. The verbose boot log is at http://www.raad.tartu.ee/~toomas/bootlog.txt -- Toomas Aas