Lost Boot-up Screen on Mac Pro 5,1

[spetznatz]

When starting, I get no boot screen... it just stays black until the desktop appears, except for a small progress bar in the bottom left corner (see pic). When I try and boot from the Recovery partition or Install USB, I get nothing... the screen stays black. Card is an nVidia GT120 (Mac edition).

Now I did try a flashed card in here yesterday, to check 4K support. It gave me the boot screen, but this problem occurred when I replaced it with the GT120. Could this have messed anything up?

 

[Synchro3]

This is the boot screen since OS X Yosemite. You see just a quarter of the screen. Normally the progress bar is in the middle of the screen.

 

[netkas]

try to zap pram

 

[spetznatz]

So, Synchro 3... the default behaviour in Yosemite when holding down cmd-R or option on startup is to show a black screen and hide the boot loader / recovery partition? Who knew?

Thanks, netkas, I'll give it a go...

 

[spetznatz]

No joy... re-set PRAM three times and the SMC controller... will try another video card.

Also, I'm not getting a start-up chime anymore...

EDIT: It was the monitor... I got the boot screen on another monitor, so just did a factory reset on the Dell, and all is fine now... except no start-up chime...

 

[ActionableMango]

How did you know you reset the PRAM without boot screens and without hearing chimes?

 

[spetznatz]

... Because I heard the double chime for the PRAM reset but got no chimes on subsequent restarts... Sudo nvram -d SystemAudioVolume restored the boot chime.