Most likely you would need an active dp -> dvi adapter or a monitor with dp connector. That would be the most easy way to try.
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890GX/HD4290 dual display question
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In most cases he should, but it depends on the oem/bios. Also, if you have a secondary card in the pcie x16 slot, it will disable the DP port since they share lanes. There really should be a bios option to enable/disable the DP port.
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The monitor is a single link. In fact, my DVI wires themselves are only single link (missing the 6 pins in the middle) and work when plugged into the DVI port, so definitely shouldn't be needing any active adapter.
I've tried now with next-20100716, which includes that patch. No difference. The dmesg for next is here: http://pastebin.com/HjxcNJgG
I have no cards at all in any of the slots, and there's nothing in the bios to enable the DP. I have looked at those "dual slot" and "internal graphics mode" options, the "internal graphics" option is enable/disable and whether or not to use sideport memory. I don't think that sideport should make any difference to it, but I guess I might as well try just to make sure.
BTW: sorry it took me a while to get back to this, car window spontaneously self destructed yesterday, had to replace it.
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I'm just about to go through all the bios options again in every possible combination. I've also readied the W7 to test -- if it also fails there, then at least I can conclude that it is either a bios configuration, bios bug, or defective board.
Here's the xorg log: http://pastebin.com/zvW9RUq9
Nothing remarkable. It detects the DP as disconnected.
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