Quote:..Now I have installed python3.9 from source on Ubuntu 22.04 desktop..
You can install python 3.9 for evermore, Gimp uses python 2.7 plus the gimp-python packages which do not work anyway with Ubuntu 22.04
Quote:..Also I ran "flatpak" to install GIMP 2.10.30 Now Python-Fu Filter installed Please advise how to use it. Thanks
Have you never installed a python plugin before ? They go in your Gimp User Profile plug-ins folder.
For a flatpak that is ~/.var/app/org.gimp.GIMP/config/GIMP/2.10/plug-ins
I will attach a zip with two python plugins. Unzip and put in the above folder.
I think I know why some of your attempts are strange, you must correctly crop before processing. Delete cropped pixels in the crop tool options must be on.
I can demo that for you in a Ubuntu 22.04 VM https://youtu.be/mnl2-uZHt_0 3 minutes duration.
definitely my last post on this subject.