Nouveau - Apr 2016 - 2nd dvi connector on fx 380 not working, channel configuration problem ?

Hi,

I've been debugging the problem of the 2nd dvi connector on fx 380
cards not working.

I wanted to diff a dump of the pdisplay block registers under nouveau
and the binary nvidia driver, but when running nvapeek under nvidia
I get: a "WARN: Can't probe ..." error because of
pci_device_map_range() failing, is there a way around this.

I did learn something interesting though. If I rmmod nvidia.ko and
then insmod nouveau.ko I do get outout on the 2nd dvi. Normally
everything seems to work, but this is no output on the 2nd dvi,
however if I first load and rmmod nvidia.ko, and then load nouveau.ko
I get output, but not the desired output instead the monitor constantly
shows the lasts contents of the vga-text-console which was shown
before doing the insmod nouveau.ko.

This feels like progress, but I'm not sure where to look at
from here on. I do have pdisplay reg dumps of both a regular
nouveau load, and one after first having loaded nvidia.ko.

So any hints how to debug this further ?

Regards,

Hans