Correct me if I'm wrong, but I think your complaint is that the nVidia card works when you have only 2GB of memory, but stops working when you have 4GB of memory. (With 4GB, it probably still works in plain VGA mode, but not in modes that use the 256MB frame buffer.) The nVidia device is at 0000:01:00.0 and requires these resources: BAR 0 (0x10): mem 16MB (32-bit BAR) BAR 1 (0x14): mem 256MB (64-bit BAR, prefetchable (frame buffer)) BAR 3 (0x1c): mem 16MB (64-bit BAR) BAR 5 (0x24): io 128 ports ROM (0x30): mem 128KB (32-bit BAR) With 2GB of RAM, you have memory from 0-0x80000000, and the 1.5GB region from 0x80000000-0xE0000000 is available for PCI devices. With 4GB of RAM, you have memory from 0-0xC0000000, and only the 512MB region from 0xC0000000-0xE0000000 is left for PCI. Even 512MB should be enough to accommodate the devices you have, but the BIOS divided it up in such a way that only 32MB is actually routed to bus 0000:01, and I don't think Linux is smart enough to redistribute things and fix that. The dynamic allocation work you mentioned might be able to do it, but it is not in the mainline kernel, and I haven't seen any discussion about it. The frame buffer is a 64-bit BAR, and you seem to be running the 32-bit Ubuntu kernel. I don't know whether the 64-bit kernel would make a difference here or not. It might be worth trying a live CD or something. 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
