Broke it somehow...

[Nehie]

I bought a new 2560x1440 monitor without even realising it wouldn't work on my Mac Mini (2010). Max I could get was 1920x1080. I applied the pixel clock patch yesterday and hey presto, it worked like a charm. Then I did something and now it won't find a signal from the display port. I have to link with HDMI and it's back to 1920x1080 again. (This version of Mac Mini seems to allow for better resolution through DP than HDMI)
The only thing I can remember doing wrong is I didn't read the small print, where it says you have to keep SIP disabled after patching. I re-enabled it before I realised. Could that be the problem? And is there any way to go back to Square One and start again?
Thanks in advance for any tips

[Floris497]

You can enable SIP again after patching. What is the maximum refresh rate of your display?

[Floris497]

I think that mac can do 4k@30/40Hz so about 340m pixels per second. Rough calculation from the top of my head that's ~90 Hz for 2560x1440 if your display can do more it might negotiate a higher refresh rate with your mac that it can physically deliver.

[Nehie]

Like I say it was working beautifully until last night when I did whatever stupid thing I did - obviously it wasn't re-enabling the SIP then but I must have done something stupid. I'd just like to be able to reset the whole thing and start again as if nothing had happened. Is that possible?

[Floris497]

Does HDMI still work?
You can unpatch with SIP disabled see the instructions

[Nehie]

HDMI still works but that allows for only the lower res. The DP cable connection is the one I want but that's just 'no signal' now.
(Where do I find the instructions?)
PS: thanks for weighing in on this

[blooddragonhero]

Did you resolve this?