Anthony Campbell <[EMAIL PROTECTED]> schrieb:
> I had dma running with kernel 2.4.20. On 2.4.21 hdparm gives an error:
>
> HDIO_SET_DMA failed
>
> Anyone know why this is or what has changed between the two kernels?
Do you have CONFIG_IDEDMA_AUTO or CONFIG_IDEDMA_ONLYDISK enabled ? Try to disable "Use
PCI DMA by default when available". That should work.
btw: I can't get my cdrom work in DMA mode. I'm getting:
kernel: scsi : aborting command due to timeout : pid 33, scsi0, channel 0, id 0, lun 0
Read (10) 00 00 00 00 10 00 00 01 00
kernel: hdb: DMA interrupt recovery
kernel: hdb: lost interrupt
kernel: hdb: status timeout: status=0xd0 { Busy }
kernel: hdb: DMA disabled
kernel: hdb: drive not ready for command
kernel: hdb: ATAPI reset complete
kernel: I/O error: dev 0b:00, sector 68
kernel: isofs_read_super: bread failed, dev=0b:00, iso_blknum=17, block=17
Or using ide-cd instead of ide-scsi:
kernel: hdb: DMA interrupt recovery
kernel: hdb: lost interrupt
kernel: hdb: status timeout: status=0xd0 { Busy }
kernel: hdb: status timeout: error=0x00
kernel: hdb: DMA disabled
kernel: hdb: drive not ready for command
kernel: hdb: ATAPI reset complete
Everything works fine in PIO mode. In 2.4.20 and earlier kernels I hadn't any problems
so far.
*Kristian
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