* Re: [gentoo-user] unable to activate dma mode
@ 2006-07-28 13:14 99% ` Raymond Lewis Rebbeck
0 siblings, 0 replies; 1+ results
From: Raymond Lewis Rebbeck @ 2006-07-28 13:14 UTC (permalink / raw
To: gentoo-user
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).
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
--
gentoo-user@gentoo.org mailing list
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