GTX 970 not booting in 10.10.5

[iSamvir]

what connection are you using to your monitor?

dvi

 

[slyx1978]

the 980 gtx make me crazy for many days with dvi and vga
have to use hdmi and flag nvda_drv=1 npci=0x2000 -v and smbios 14,2
try this.

 

[iSamvir]

the 980 gtx make me crazy for many days with dvi and vga
have to use hdmi and flag nvda_drv=1 npci=0x2000 -v and smbios 14,2
try this.

It worked initially by using those boot flags but then when I rebooted it now just hangs on ATHR: unknown locale: 21. I checked the boot.plist and none of my original flags were there just nvda_drv=1 which is probably why the bootloader looked different. Any ideas on how to fix it, using HDMI seemed to have improved it but it is still not fully working.

 

[iSamvir]

the 980 gtx make me crazy for many days with dvi and vga
have to use hdmi and flag nvda_drv=1 npci=0x2000 -v and smbios 14,2
try this.

Ok so since my previous reply I rebooted a few times and got into the OS eventually using the flags you provided. I added them to boot.plist and have had no issues booting now. Working via HDMI, not a big issue as I'm using a 1080p 60Hz monitor. Thank you for your help all sorted now.

 

[bboczeng]

Why do you need to reboot several times before getting it to work?
Actually I had a very similar problem as you do. The NVIDIA web driver will erase everything in your boot.chameleon.plist, except for one line "nvda_drv=1".
That's why you get a strange icon instead of Apple and got back screen