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

[gentuxx <gentuxx@gmail.com>]

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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.)
>
> 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.
>


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gentux
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