I tried this:
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bash.4[~]: ls -R /usr/share/cups/ | grep ".ppd"
foomatic-db-ppds
Xerox-WorkCentre-6015B-fr.ppd.gz
Xerox-WorkCentre-6015B.ppd.gz
Xerox-WorkCentre-6015N-fr.ppd.gz
Xerox-WorkCentre-6015NI-fr.ppd.gz
Xerox-WorkCentre-6015NI.ppd.gz
Xerox-WorkCentre-6015N.ppd.gz
/usr/share/cups/ppdc:
api-ppd.html
man-cupstestppd.html
man-ppdc.html
man-ppdhtml.html
man-ppdi.html
man-ppdmerge.html
man-ppdpo.html
ref-ppdcfile.html
spec-ppd.html
bash.5[~]:
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No hp ppd files. I thought hplib would include the needed ppd files. Apparently not.
After looking at the hp website again, it looks like I should now clean out cups as you
said, then try Terry's suggestion.