Help Please! Nvidia Web Graphics not working High Sierra 17G14042 and GTX 980 ti

[joevt]

So as you suggested, should I replace "1" with putting 1234 or something, in the "sudo nvram NvidiaWeb=1" and see if it retains the random value after restart, if it doens;t then as you suggested I'll ask in the Boot ROM tread.

I suggested changing the name of the variable, not the value
sudo nvram myspecialtestvariablename=1

 

[rk44722]

I suggested changing the name of the variable, not the value
sudo nvram myspecialtestvariablename=1

Oh Ok, apologies for this. I'm new to this coding etc. so wasn't sure if I needed to change the variable name or the actual value.

I'll just change variable name keeping the value as 1 and see if it retains the value after reboot. Thanks

 

[rk44722]

hi, I tried to reset the NVRAM and every time after reboot it takes the value away, I tried to change the variable, it shows in the list by nvram -p command but after that it takes it away after reboot. Very annoying.

 

[joevt]

Try asking for suggestions in the BootROM thread.
Do you need a new battery?
Use Terminal.app from macOS Installer USB to try changing NVRAM?
Maybe your NVRAM is corrupt.

 

[rk44722]

Thanks I asked as you suggested on the other thread, I've been told to hard reset the NVRAM by pressing the cmd+alt+p+r and it works so far. Thank you so much.

I think the guy is saying that I need to clean up boot rom / reconstruct it. not sure but seems like he know what he is talking about. so will give it a try.

 

[rk44722]

Now I need to find out why I'm getting that APFS black screen in the beginning before the Apple logo on restart of the machine. Any idea.

 

[joevt]

Do you mean APFS black screen with text? That's normal when booting APFS.

 

[rk44722]

Yes, that is the one, black screen with text, if that's normal then fine, I never seen that before so wasn't sure if that is normal or not, it also only shows when I've the 980 GPU, if I change and put back 5770 then I don't think the screen with text shown in the beginning.