If it does not work under factory with previously non-posted chip then you are going to have to re-enable the IO printfs and see whats up.
What exact is the meaning of posted and non-posted.
Sorry. My bad. I forget about the lingo sometimes.
post or rather POST. Power On Self Test. The video bios people call a card that has been initialized by the BIOS 'posted.' Probally because it happens during the BIOS which used to be much more of a POST. Nowdays BIOS is a whole different beast but the 'posting' term remained.
posted = initialized.
-- Richard A. Smith