Last night I installed a Stretch netinstall without desktop environment, then installed Plasma 5.12 on top of it from the NeptuneOS repository. I just installed the plasma-desktop metapackage. So far seems to have no issues after a few hours of use.
Previously I tried to upgrade an MX install in which KDE was installed from the package manager to the Neptune version. It worked to some extent but themes and window decorations were flaky.
Note that I haven't tried this on MX yet as I was up way past bedtime doing the Stretch thing. I may try it soon and will report back.
Just posting this now for anyone contemplating a Plasma 5.12 respin as it may save rebuilding all the packages considering NeptuneOS has already done it.
Disclaimer - no guarantees, YMMV, it may break stuff. Don't do it on your main system.
The repo entry is:
Code: Select all
deb https://download.neptuneos.com/repos/neptune5/repo-kde/ stretch main