LinuxCNC on Linux Mint 20 quick and nearly easy install

Yes but very limited. Have wiped my drive and reinstalling, hopefully??

Well the total reinstall of Mint has resolved the matter as the "CNC" menu has reappeared with all the options. A mystery why.

It was nearly easy instal. Even as Im very much Linux newbie.
I made fresh instal from 2.8.0 Linuxcnc and Debian Wheezy.
Got linuxcnc running with my old Ini and Hal files, but now I have these problems.

- when starting Linuxcnc: hm2/hm2_5i25.0: Smart serial port 0: Dolt not cleared from previous servo thread.servo thread propably too fast.
- also my servos are making sounds, like belts would be cracking. Hal file has previous PID tuning adjustments done, even though I went to pnconfig and loose all my settings. i know, custom.hal next time. This is my main problem.

- on pnconfig comes error about missing hosmot2

Wanted to make this update, becouse I have been fighting with Vistacnc pendant for days, its disconnecting usb Very often. This is still to be tested.

What does
uname -a
in a terminal say ?

linux teppo 5.4.0-26-generic #30-ubuntu SMP mon apr 20 16:58:30 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

Looks like you did not install a real time kernel.