>But there's a nasty side-effect of the proprietary driver - the system >seems to freeze for a few seconds every once in a while (about once a >day). >There are no side-effects of the open source driver, but i don't know >how to tell it to work in dual-head mode and i don't know how to silence >the fan. Often this sort of problem is APM or ACPI related. You could try turning all power management stuff off in the BIOS and disable it in the kernel boot parameters and see if that helps. HTH