Seems like it is the NEC 2690 monitor but why when it is always connected ? No alternating flashing screens and certainly no blank screens and I was able to log in on the first attempt. I connected the Gefen DVI Detective Plus to the NEC 2690 monitor and followed the manufacturers instructions and let the unit download the monitors EDID which took just two seconds at most.ĭisconnected the power supply and re-started the Mac Pro 3,1. I then have to press and hold the power button to shut down the system and then reboot the sytem and then the screens come up properly for me to log in. One monitor is the NEC Spectraview 2690 which is connected to the mini-Display port and the other monitor is the Apple 23" connected to the DVI port.Īfter I have shut down the Mac Pro at night and restart it the following morning, two (BOTH) blank screens appears on booting up. This seems like a NEC monitor problem as I have a Mac 3,1 and have recently fitted the ATI Radon HD 5870 replacing the old graphics card. I don't have any other graphics card or monitors to test with, so I was hoping that someone with a similar display configuration could confirm or deny issues when logging into 10.8. The same configuration boots 10.7.4 (and 10.6) with no issue. If I have the monitor turned off (or switched to a different input) at the time the login window would appear, then login always proceeds normally, and the monitor can then be turned back on. Swapped monitor input from DVI-D to DVI-I, used different cable installing on drive with single partition Installing over clone of current Lion system Installing on different, brand new hard drive (with different partition ordering) Replacing GTX-285 card with stock GT-120 Unplugging all USB & firewire devices except keyboard & mouse Disk Utility repair permissions & repair disk I've tried each of the following to try to isolate the problem, with no success: This is reproducible for me on a clean installation on (multiple) new hard drives.Īfter trial and error and research on threads concerned with similar (but not exactly the same) issues, I believe I've isolated this to 10.8 having trouble switching to my NEC 2490WUXi monitor connected via DVI, coupled with either an Nvidia GTX-285 or GT-120 graphics card. Specifically, about 7 in 10 reboots will not get to the login screen (or autologin), instead getting stuck on a blank gray screen (after the Apple logo and spinning progress indicator are dismissed) with a moveable (and sometimes garbled) cursor. I've spent the last several weeks trying to isolate an issue when booting 10.8 on my 2009 Mac Pro that seems fairly unique.
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