On Mon, 2007-07-09 at 13:16 +0100, Alan Cox wrote: > > > It would be useful to know if a kernel built with no DMA support for the > > > IT8212 behaved as that might give us a clue about what is choking. If you > > > look in drivers/ata/pata_it821x.c:it821x_init_one you'll see a pair of > > > lines that say > > > > > > mwdma = 0x1f, > > > udma_mask = 0x7f > > > > > > > > > remove, rebuild and report.. > > > > Alright. > > > > Attachment [0] is a successful boot with those lines removed. (This a > > good thing or a bad thing? :) > > Thats an interesting question in itself. It does seem to indicate the > problem is DMA tuning or DMA related and not IRQ routing - which is good > as of itself. > > > Attachment [1] is a successful boot with the old ata subsystem using the > > IT8212. > > For the next trick set mwdma_mask = 0x07 but leave UDMA off and see what > happens. Lock. > Then try with udma_mask = 0x02 which should force the 50MHz > clock on not the 66MHz clock just in case its clock related. Lock. :( > How much RAM do you have ? 1536MB, using highmem 4GB. Please refer to my dmesg attachments in the last post for more RAM info :) > Alan -r - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
