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SubjectRe: ata_piix, laptop cdrom, ICH7: EH, limiting speed to PIO
On 9/17/07, Tejun Heo <> wrote:

> >>>> BTW, this only happens when using libata of course. The
> >>>> old CONFIG_IDE stuff works fine every time.
> >>> This maybe one of libata weirdness (I really don't get it why some hardware
> >>> works perfectly fine with an old IDE and don't work well with libata).
> >> Hmmm... Is MWDMA2 mode used with ide driver too?
> >>
> >
> > What's the best way to tell whether it does or not? (the log says
> > "selected mode 0x22", see below)
> Yes, that's MWDMA2. Hmm... We're seeing many cases where MWDMA doesn't
> work with libata while it works fine with IDE but have no idea what's
> going on yet. :-(

Okay, thanks. Please feel free to contact me if you need any more testing done.

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