On Tuesday 05 January 2010 07:16:21 pm Alex Brooks wrote: > > I don't see any indication that this is a software problem (I know > > nothing about PC/104, so let me know if you disagree, and why). > > I don't have a smoking gun that points at software, it was just my guess > based on: > a) all the pieces of hardware work in certain combinations > b) there's a nasty-looking error message in dmesg You mentioned two messages. Here's the first: PCI: BIOS Bug: MCFG area at e0000000 is not reserved in ACPI motherboard resources PCI: Not using MMCONFIG. and the second: PCI: Cannot allocate resource region 0 of device 0000:01:04.0 PCI: Error while updating region 0000:01:04.0/0 (feb00002 != 00000000) The "Error while updating region" message is because we wrote something to a BAR, read it back, and they didn't match. I suppose this could be some kind of config space problem related to the fact that we're not using MMCONFIG. Can you try removing the MCFG reservation check, so we do try to use MMCONFIG? If you do this on a current kernel, we'll also get a little more debug output about the subsequent resource allocation failure. Bjorn -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
