V1000 cards can only work as primary display card due to hardware limitations.
Some V1000-based videocards are known to lock up the computer if you have write-combine activated. Disabling it removes the problem. Look for settings in the motherboards BIOS and disable ALL settings that has to do with write-combine (usualy called USWC or just WC for short).
The "chipset" option is now implemented and honored when used. Unfortunatly some legacy-code in the driver is preventing it from working with any cards but the primary display card.
If you have problems with hardware cursor use the "sw_cursor" option to revert back to software cursor.