Black screen when booting Yosemite GM USB

[yonyz]

Hi,

 

I've followed this guide to make a USB installer for 10.10 (I used the GM version). 

When I boot into the USB installer, everything loads fine, and then it gets to the nvidia drivers, and is just about to show me all that 10.10 installer goodness, but all I get is a black screen - the monitor goes into sleep mode. 

I tried GraphicsEnabler=No and also =Yes, to no avail. Also tried -x (safe mode), which didn't help either. 

I have a GTX 570. On Mavericks, I use GraphicsEnabler=Yes and I never had to install and graphics kexts, and all that QE CI stuff works just fine. I have a GT 520 which I can try, but eventually I will have to switch back to the 570, for gaming purposes, so if there's any boot flag or kext I should try, please let me know.

 

Thanks.

 

Edit: It boots fine with my GT 520. Installation went smoothly, but now I can't boot into the OS because I get a mach_kernel error (I think it says it wasn't found).

 

Edit 2: mach_kernel error solved by reinstalling Yosemite, and this time choosing NOT to migrate settings from Mavericks to Yosemite.