On Sat, 29 Jan 2000, Rainer Wiener wrote:
> Hello,
>
> I have a problem to get the DMA-support work with my Toshiba Satellite CDS
> 300. I have tried to switch on the support with hdparm -d 1 but it would not
> work. So what can I do? Or is there some options in the linux kernel?
>
> this following options I have switch on:
>
> - Generic PCI IDE chipset support
> - Generic PCI bus-master DMA support
> - Use DMA by default when available
>
>
I tried this on my Acer. I followed the old R&D maxim "If at first you
don't succeed - give up!"
But I did learn this much. The /var/log/boot.msg lets you know how your
kernel likes the pci chipset. There is support for generic pci chipsets, and,
if yours is funny, dma goes out the window.
There is kernel support for some sick or silly pci chipsets, (Non
generic chipset support or somesuch) Get a hacker's kernel and have fun, as the
chipset support is getting better. Look up the laptop pages on your machine,
for a guess at the chipset. The distribution install floppies sometimes give
you all this by shouting "who's there?" down the pci bus and telling you who
answers. I know suse's does. But it makes ABSOLUTELY no sense of Acer dma at
all!
Regards,
Declan Moriarty
