Re: [xine-user] ide-scsi + devfs how to make DMA ?

[Peter K. <pwk...@gm...>]

Hey,

very nice, that fixed it nice and cleanly !! You rule :o)

Thanks alot. My DVD plays flawlessly now.
Peter

Am Sonntag, 30. M=E4rz 2003 03:20 schrieb Rich Wareham:
> Peter Kirk wrote:
> > Hiho,
>
> Hi
>
> > The problem:
> > When I play a DVD the playback is very laggy, I strongly suspect this
> > being due to DMA not enabled on this device.
> >
> > The question:
> > Many of you guys wrote to simply tell hdparm to enable dma on the
> > /dev/hdX, even if the scsi emulation was active. This worked for me in
> > the *old* days where i had no devfs. But now, there simply is no /dev/h=
dc
> > when I kick in the scsi emulation. Also hdparm refuses to work on the
> > scsi devices. How on earth do I get DMA running on my box ?
>
> I've got /dev/hdd setup as a ide-scsi device. I'm also using Gentoo:
>
> root@hades hdd # ls /dev/hd[a-z]
> /dev/hda  /dev/hdc  /dev/hde
> root@hades hdd # ls /dev/sg[0-9]
> /dev/sg0
>
> The key is to use the proc filesystem and write some magic to a special
> file:
>
> root@hades hdd # pwd
> /proc/ide/hdd
> root@hades hdd # grep using_dma settings
> using_dma               0               0               1               rw
> root@hades hdd # echo 'using_dma:1' >settings
> root@hades hdd # grep using_dma settings
> using_dma               1               0               1               rw
>
> HTH

=2D-=20
Reality must take precedence over public relations, for Mother Nature
cannot be fooled.
		-- R.P. Feynman