G'day all, I caught the suggestion on my last post in the archives, but because I'm not subscribed and wasn't cc'd I can't keep it threaded. I tried backing out the suggested acpi patch (No difference at all), and I managed to get apic to work but it still hangs solid in the same place. dmesg attached. I managed to figure out that the VIA ATA driver captures my sata drives on the via ports, explaining why sata_via misses them, but writing data to those drives (hde & hdg) causes dma timeouts and locks the machine. No useful debug info produced. The machine becomes non-responsive, throws a couple of dma timeouts to the console and then loses all interactivity (keyboard, serial, network) forcing a reset push. Is there any way I can prevent the VIA ATA driver capturing this device? Unfortunately my boot drive is on hda on the on-board VIA ATA interface so I need it compiled in. Please CC: me on any replies. Regards, Brad