Hi Freemangordon,accidentally i understood from where comming my problem about installation cssu-thumb2,the key lies in ke-recv,on clean installation only with kp52 and usbmode when i installing version of ke-recv 3.19-17.1+thumb0 or 3.19-17.2,the symptoms are the same(black screen)
Maybe that script in /etc/default/osso-mmc-blacklist.sh is troubled,there is some explanation
http://wiki.maemo.org/Community_SSU/Features/ke-recv
I don't know,maybe I could be wrong
regards