I have the exact same issue: 2 monitors, 1 vga & 1 dvi, the DVI is not displaying anything once win is starting to load.
In win i get the same error: 'Your system has no multi monitor support'
Please share how you fixed your problem.
I have a Sony PCVRS520. With an ATI 9200SE graphics card I have been using two monitors for several years - one VGA and one DVI. Last
Friday the "No support" message appeared and my DVI port monitor failed. Using the vga port - I can receive video on either of the monitors, so it does not seem to be a monitor failure (unless the cable could fail?). I changed out the video card for another dual head with the same result - vga but no DVI.
To my knowledge the only recent software updates came from MS.
After contact with Sony I have reset the BIOS and deleted and reinstalled the video driver. Still no DVI signal.
As an college instructor I have a need for both monitors. Suggestions and guidance?