In my last blog i mentioned Calf plugins GUI’s have not been rendered, i could only use them with built-in gui of host applications (Ardour and Reaper in my case)
Since PayPal is not active in Turkey, i always pull from repository and compile Ardour from source code. As always i do, i pulled latest source code and uninstalled 7.2
If you compiled Ardour from source code before, you should saw the step ./waf configure. Then i realized libsuil is marked as “no” during that step. But i was sure, i installed libsuil to build Ardour. I knew LV2 plugins required libsuil to render their gui. Anyway, computer never lies, check the situation with:
apt search libsuild
I saw i only installed libsuil-0-0 but no libsuil-dev. I installed libsuil-dev package and run waf configure step one more time, waf marked libsuil as yes this time.
Proceed with build:
sudo apt install libsuil-dev ./waf
Brew your coffee, Ardour will be ready meanwhile.
Checked Calf plugins after build and validated they are running.
Long story short, if your calf plugins GUI not visible probably, a library is missing. Of course that only applies if you build calf plugins yourself.
I hope this solves your issue as well.