akasurreal Posted July 17, 2011 Share Posted July 17, 2011 I am running 3 x 24" 1920x1200 monitors, so I need to use a DisplayPort to run at least one of them. I have 2 Active DisplayPort Adaptors, both certified by ATI. They both work perfectly when I am booted into Windows. When I boot OSX (10.6.8), any Display Port connected monitors come up with a garbled display, until I either unplug/replug the DP cable or switch to another resolution on each affected monitor then switch back to the native 1920x1200. It is then fine until I reboot again. This isn't that bad I suppose but it's quite annoying. Does anyone have any ideas on how I might address this? I have tried a PowerColor 6850 and an XFX 6870, both have the identical behavior with the Display Port connected monitors. I have attached some images of what I mean by garbled. Link to comment https://www.insanelymac.com/forum/topic/262575-6850-and-6870-displayport-garbled-on-reboot/ Share on other sites More sharing options...
akasurreal Posted July 17, 2011 Author Share Posted July 17, 2011 After some more trial/error and testing, it appears the problem is linked to running at 1920x1200 on a third monitor on a Display Port. If I set that monitor to 1600x1200 for example, it comes up fine on reboot. I know 1920x1200 is the max resolution for the ATI Display Ports. Not sure if any of this will ring a bell for anyone how I might address this? Link to comment https://www.insanelymac.com/forum/topic/262575-6850-and-6870-displayport-garbled-on-reboot/#findComment-1716210 Share on other sites More sharing options...
Recommended Posts