Hi,

I'd like to use one head of a Matrox G550 to drive a remote video projector. 
The projector has an ICS 1523 PLL for pixel clock recovery from the SVGA 
RGB analog signal. This set-up works under Windows 2000, and under Linux 
(same PC)  using a variety of other graphics cards and a variety of XFree86 
server releases (same modeline). 

However it doesn't work with the G550 under Linux with XFree86 4.10 and the 
latest drivers from the Matrox site. I tried 4.20 (and the latest CVS) but 
can't get the G550 to work dual-headed, hence 4.10. 

Any ideas about why the RGB analog signal (from both DVI and RGB heads) of 
the G550 should differ from that of other graphics cards?

Many thanks,
Fergal.
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