busmaster/latency for video

[Ryan Nielsen]

PCI_COMMAND_MASTER is not enabled and latency = 0 for the ultimate rez video card, and pci_write_config_*
do not change them. latency = 32 and mastering is enabled for all the other cards in the machine,

should they be enabled ?

a machine check happens when calling sys_idle after using offb with the ultimate rez.

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