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Do you have LATHE = 1 in the [DISPLAY] section?

I'm looking into why the plotter does not show the correct view for a lathe like Axis does.

The Diameter/Radius checkbox works with LATHE = 1.

JT

What Linux version?
What RT kernel?
Does
sudo lspci -v
Show the wifi card?
Any way you look at it, get a USB WiFi dongle, built in WiFi is PCI-E so can cause big latency issues when in use.
If you still want to use it, might have to install the latest RT kernel available for whatever your Linux version is.

All PC's in probably last 10 or more years like to have 2 memory modules as they can all do dual channel communication.
Some Xeon's and AMD can evem do 4 channels.
And yes, more memory improves latency, so 8GB should be minimum and there is no reason to have over 16GB for Linux and LinuxCNC if used for machine control only.
When possible, always choose 2x4gb or 2x8gb.

Did you change the the dtb in /boot/armbianEnv.txt
fdtfile=rockchip/rk3399-orangepi-4-lts.dtb
-> fdtfile=rockchip/rk3399-orangepi-4.dtb
+ extraargs=isolcpus=5 or 2-5

And what result do you get?

To prevent the rt kernel from getting overwritten you could hold the package with: sudo apt-mark hold packagename