Hi, I finally succeeded to see something on my external monitor using the DVI port of a port replicator. However, the time of happyness was rather short, since after a while the display froze and the machine was crashed. There is also a problem with booting the machine with the external display switched on. When I switch it on later it works (until the freeze ...). I do not know what the problem might be. I checked the log file and it seems that the DDC recognition does not work. In addition, the following seems to be not right: (II) RADEON(0): Primary: Monitor -- LVDS Connector -- DVI-D DAC Type -- Primary TMDS Type -- External DDC Type -- NONE (II) RADEON(0): Secondary: Monitor -- NONE Connector -- VGA DAC Type -- Primary TMDS Type -- NONE DDC Type -- VGA_DDC I guess, the connector of the second head should be DVI. This is the way I configured it ... Appart from this both displays use different timings. Maybe with different modlines everything could work. Or maybe I have some experimental modules loaded which I should not load. Or should I use the old radeon driver? My xorg.conf + Xorg.0.log can be found here: http://www.cl.uni-bremen.de/~stefan/transfer/xorg.conf http://www.cl.uni-bremen.de/~stefan/transfer/Xorg.0.log Thanks for any hints or comments on the setup/problem. Best wishes Stefan -- Stefan Müller Universität Potsdam Tel: (+49) (+331) 977-2180 http://www.cl.uni-bremen.de/~stefan/ http://www.cl.uni-bremen.de/~stefan/Babel/Interaktiv/