[Fwd: Re: PS/2 mouse lagging]
On Thu, 2002-03-21 at 16:38, Patrick Lane wrote:
>
> blacktop:/home/mandingo# for i in a b; do hdparm -d 1 /dev/hd$i; done
>
> /dev/hda:
> setting using_dma to 1 (on)
> HDIO_SET_DMA failed: Operation not permitted
> using_dma = 0 (off)
>
> /dev/hdb:
> setting using_dma to 1 (on)
> HDIO_SET_DMA failed: Operation not permitted
> using_dma = 0 (off)
> blacktop:/home/mandingo#
>
> It won't let me. Do I have to enable something in the kernel?
Um. "Generic PCI bus master DMA support" should be Y, and to save you
issuing the hdparm you can set "Use PCI DMA by default when available".
CONFIG_BLK_DEV_IDEDMA_PCI=y
CONFIG_IDEDMA_PCI_AUTO=y
Kind Regards
Crispin Wellington
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