Ever since the PiPlay version you installed, Nolo is automatically supported. No need to go and get an older PiPlay version like 1.2.85…
If you don’t want to use 2.x and above, I recommend using 1.2.93 or higher because of the magnetic calibration.
And I recon you did install the camera on the 4K and have the usb for it plugged in? I’m not seeing a base station active on your screenshot too (which you should have). And it’s no problem installing the Nolo drivers, but the software shouldn’t be active when starting your PiPlay and trying to use your HMD. That might cause detection issues.
Is the gyro of the 4K still on? Because you can disable it in PiPlay, but when I tried that, thinking the Nolo camera would do a better job with the headmovement than the gyro’s on the 4K, the headset lost tracking in SteamVR too. It seemed that the drivers still need or use the gyro data on the 4K.
The Pimax team did remote to my pc to try and resolve the issue. They did not find a solution to my problem and concluded that the Pimax works fine without the Nolo. The problem is the Nolo and I am waiting for the Nolo Team to get in contact with me for a solution.
I find it a wee bit strange though that there just are a few of us pimax + nolo owners that have issues. even the russian dude who also have problems doesn’t seem to have exacly the same issues… since he can start steamvr and turn the headset backa and forth… i only get the grey wall.