I just tried the latest version of the Avivo driver from GIT using a 512MB X1950PRO -- works significantly better for me than the previous version, but I still had to patch it a little (attached). My CRT doesn't support being queried for valid modes and this is still causing problems. When I tried the current verison, I got the errors "(EE) avivo(0): No valid modes." and "(EE) Screen(s) found, but none have a usable configuration." The Xorg.log indicated "Output DVI-I using monitor section My Monitor" and "Output VGA has no monitor section", but I'm using VGA. I discovered that changing the first error return in avivo_output_detect_ddc_dac (avivo_output.c) from XF86OutputStatusDisconnected to XF86OutputStatusUnknown causes the CRT to work. (The Xorg.log still indicates DVI-I not VGA is using the "My Monitor" section... I don't know if that means anything since the card has two DVI connectors and I'm using the adapter that came with it for the 15-pin VGA connector.) The driver still forces a 60Hz resolution even with a manual modeline specification (and refresh rates that should allow at least 75Hz). Still, it's much improved -- Thanks! Robert