Linux X.Org driver
This chip is supported by the 'trident' driver as part of the X.Org distribution
Display on the internal LCD works as long as you set the monitor settings correct.
External VGA port
TV Out port
Available only on machines with the optional DVD and Enhanced Video Adapter (DEVA) installed.
Only works at 800x600 or lower. When using APM, TV out is switchable using tpctl. Should be switchable using the acpi video module, but I don't think it works. Alternatively can switch to TV before booting linux.
Linux kernel Framebuffer driver