I think we have narrowed this down to acpicpu + apmd. Do you run both as well?
On Fri, Feb 13, 2009 at 11:42:34AM -0500, Dan Harnett wrote: > On Wed, Feb 11, 2009 at 08:09:16PM +0100, Markus Bergkvist wrote: > > I get kernel freeze randomly on Compaq 6710b with -CURRENT synced today. > > It is best reproduced by keeping the system busy, such as building > > userland, but there are no guarantees. > > > > I've been running memtester and also memory and hd test in bios, no > > errors were found. > > > > I get no ddb or any other output on terminal, it just freezes up. What > > can I do to retrieve information so I can file a proper bug report? > > There is no DE-9 contact but the serial port is enabled in BIOS and I do > > have a uftdi-device, if that might be useful. Any help is appreciated. > > I'm seeing the same issue on any amd64 machine I've tried. The i386 > snapshot from the same date works fine on the same machines. I'm not > even able to invoke ddb from the console. I've been able to trigger it > with a lot of disk activity (dd, scp or rsync of large files, etc). > Sometimes they lock up immediately, sometimes it takes a fews minutes, > but that always seems to trigger it for me.