Further investigations and testing indicate that the boot-option noapic provides an usable workaround. I've had the affected computer running with that boot-option for several hours, leaving it unattended with programs that I usually had running when the lockup occured for quite a while (this would usually trigger a lockup) and so far it seems like it is gone.
Further investigations and testing indicate that the boot-option noapic provides an usable workaround. I've had the affected computer running with that boot-option for several hours, leaving it unattended with programs that I usually had running when the lockup occured for quite a while (this would usually trigger a lockup) and so far it seems like it is gone.