On Sun, 17 Jun 2001, Markus W Kilbinger wrote:

> Since the pmap changes kernels with and wihtout NEWPMAP option fail to
> boot my tibook (g4) with lost interrupts while accessing the ide disk:
>
> wdc0:0:0: lost interrupt
>         type: ata tc_bcount: 512 tc_skip: 0
> wdc0:0:0: dmamode timed out
> wd0c: device timeout reading fsbn 0 (wd0 bn 0; cn 0 tn 0 sn 0), retrying
> [...]
>
> Any hint?

Soon after Tsubai's NEWPMAP option. Manuel Bouyer has commit a patch
to wdc_obio.c that fixed the same error as yours for my G4 (but the error
on my computer happened under heavy load) Perhaps you should update your
kernel sources anew. Hope this will help,

-- 
Samuel.