Re: [gentoo-user] unable to activate dma mode

[Raymond Lewis Rebbeck <dystopianray@gmail.com>]

On Saturday, 29 July 2006 5:16, gentuxx wrote:
> Raymond Lewis Rebbeck wrote:
> > On Friday, 28 July 2006 22:36, Stefán István wrote:
> >> Hello!
> >> I'm not able to activate dma mode for cdrom drive in my laptop.
> >> # hdparm -d1 /dev/hdd
> >>
> >> /dev/hdd:
> >>  setting using_dma to 1 (on)
> >>  HDIO_SET_DMA failed: Operation not permitted
> >>  using_dma    =  0 (off)
> >>
> >> [snip]
> >>
> >> I think the problem is that there is no driver for this chipset compiled
> >> into the kernel. But I don't know which driver should be compiled into.
> >> I tried Intel PIIXn but it didn't help.
> >>
> >> Thanks for the help in advance,
> >> István
> >
> > You will need to set CONFIG_IDE=n, enable SCSI cdrom support
> > (CONFIG_BLK_DEV_SR) and enable the Intel PIIX sata driver
> > (CONFIG_SCSI_ATA_PIIX).
>
> Isn't this deprecated?  Wouldn't a better choice be to install the
> SATA driver ebuild?  (Mainly trying to eliminate my own confusion here.)

No, libata is most certainly not deprecated and what ebuild are you talking 
about?

>
> > DMA should then work perfectly fine. However one side effect is that your
> > cdrom drive will become /dev/sr0, although I guess this can be fixed
>
> with a
>
> > udev rule.

-- 
Raymond Lewis Rebbeck

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