it also depends on your tv settings , and cables, adapters used , i found that after hours of setting up everything forwards and backwards and getting nervous breakdowns in between
short story i bought a small 15"black /silver polaroid tv with hdmi in , so i bought for my mini G4 a dvi to hdmi cable , worked perfect , after fiddling around in settings of the mini and of the tv

but i did want to match the tv to my other Mac's around which are obviously all white , so i bought nearly the same model of tv but in pure white , changed the stand over from the black/silver one as i did want it matching to the iMac white housing silver foot , to make it short this newer tv also from polaroid also 15" but the serial number was a bit different and it would not recognise the mini over hdmi with the previously working resolution despite in the manual both tv's have the same resolution i always got always only ridiculous resolutions no mater what i did , went into settings of the tv changed whatever i could there but nothing

it simply would not display in nativ resolution

a mate gave me the idea to try out a different dvi to hdmi cable

i thought dvi is dvi and hdmi is hdmi so where would be the difference between them ..ok gold plated or not but i could not think of anything else
but the differences are huge as i had to find out after googling there is dvi-i dvi-d ..... single and double link,so i found out my dvi to hdmi was on the dvi side a dvi-d single link , so i bought one cable which had some pins more on the dvi side means dvi-d double link and surprise it worked like a charm full resolution was back , so maybe its the same thing with your adapters
i know the MDP is different to the dvi but its still a connection and if some signal doesn't come over through all the adapters used then you can setup whatever you want without a result