I do not understand how duplicate instance creation code in xf86MatchPciInstances (the block under "XXX This currently doesn't work for cases") could possibly work. With my configuration, allocatedInstances ends up being _4_, I get the error message "(WW) NV: No matching Device section for instance (BusID PCI:0:13:0) found" and the second video card is ignored. Specifically, it should not be creating a duplicate instance the _first_ time it finds a matching busID.
Created attachment 2937 [details] [review] testcase
Created attachment 2938 [details] [review] testcase - with corrected license
Bug report eaten by fd.o disk crash some month ago.
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