I have a MacPro 2009 with the ATI Radeon card. I have a problem with my two screens, they lag and its impossible to use a mouse because it jumps all over the screen, movies lags as well as scrolling a website.
I have no idea why this is happening, but Ive tested the card where I work, on a similar machine and it works, tough connected to an Apple display.
Ive installed Windows and no problems detected there. Ive used both DVI and VGA connectors to my screen, no difference. NVIDIA GeForce 120GT works fine so Im leaning towards a driver issue, but I dont know how to fix it.
Ive cleane installed OS X many times, booted in 32 and 64-bit mode, reset the computer, nothing works.
Any help would be appreciated.
My setup is: MacPro 4.1 2x2,26Ghz/12GB RAM/OS X 10.6.4 and two BenQ T2210 screens.
I have no idea why this is happening, but Ive tested the card where I work, on a similar machine and it works, tough connected to an Apple display.
Ive installed Windows and no problems detected there. Ive used both DVI and VGA connectors to my screen, no difference. NVIDIA GeForce 120GT works fine so Im leaning towards a driver issue, but I dont know how to fix it.
Ive cleane installed OS X many times, booted in 32 and 64-bit mode, reset the computer, nothing works.
Any help would be appreciated.
My setup is: MacPro 4.1 2x2,26Ghz/12GB RAM/OS X 10.6.4 and two BenQ T2210 screens.
