[...]
> cd0 (piixide:0:0:1) is found, but wd0 (piixide:0:0:0), the boot disk,
> is not. This does happen with several kernel configs including GENERIC.
[...]

At least for me, using todays sources, it is working again.

(But I have no idea why, since I cannot relate any of the files
changed in this update to my problem.)

Holger