Suppose I have a Linux Xen machine with multiple graphics adapters + an onboard graphics adaptor.
Suppose they are all PCIe adapters.
I am guessing that the Linux kernel decides to use whichever graphics adapter it finds first to use as it's VGA output when booting?
Is there a way to direct this output to a specific adapter through a kernel boot option?
Reason: I'm wanting to keep onboard graphics as the console output for Linux (it is ubuntu server - not running X). The other graphics adaptors will be passed through to multiple Xen guests.
Note: It doesn't make any difference as to whether a monitor or dummy VGA plug is attached. Linux grabs one of the cards regardless of the state of any connected device. What I'm wanting to do is to tell the kernel I want you to use the adaptor at xx:xx.0 pci address or something.