*FIXED* DMA Support for CDROM's on VIA 82Cxxx

[James Gray]

On Mon, 29 Aug 2005 19:47, Christoph Wiesen wrote:
> Am Sonntag 28 August 2005 15:12 schrieb James Gray:
> > ***********************************************
> > **** A kernel recompile is NOT necessary!! ****
> > ***********************************************
> >
> > You simply need to edit the /etc/modules file as follows:
> > 1. REMOVE (or comment out) the line:
> >    ide-generic
> > 2. Add following line *ABOVE* all of the ide-* lines (probably 1st line
> >    under the comments section):
> >    via82cxxx
> >
> > Now simply reboot and verify "sudo hdparm -d1 /dev/hda" doesn't return
> > an error and that /dev/hda has DMA enabled (sudo hdparm /dev/hda). 
> > Voila!
> >
> > To permanently configure /dev/hda with DMA support, edit
> > /etc/hdparm.conf: /dev/hda {
> >     dma = on
> > }
> >
> > And here's some keywords for google to grok:
> > ubuntu kubuntu via cdrom DMA VT82C586A/B/VT82C686/A/B/VT823x/A/C
>
> That's a very helpful entry, thank you.
> I had exactly the same problem and fixed it before with the a similar
> solution like you described.
> Although I still have overall bad performance, which seems to be due to
> harddisk access (not measureable through hdparm though), this helped a
> lot and made me able to burn disks.
> Hope it will be fixed in breezy out of the box though.
>
> Cheers,
> Chris

Thanks :)  Apparently this problem stems back to the debian installer which 
add "ide-generic" by default during the install process, but never removes 
it once a more "accurate" picture of the hardware has been made.  A few 
people have filed bugs against this for Debian, so I'm not sure how long it 
will take to filter through to [K]ubuntu.

Maybe the Ubunutu installer team can fix this and provide it back to 
Debian ;)  Here's hoping!

Cheers,

James
-- 
Some marriages are made in heaven -- but so are thunder and lightning.
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