Quote:
Originally Posted by KevinH
You might want to try running qtdiag to see how Qt sees OpenGL. It should come with the Qt on that system.
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qtdiag cannot find my qt installation
Code:
qtdiag
qtdiag: could not find a Qt installation of ''
Though I know I have installed qt5 (5.15.3)
Quote:
Originally Posted by DiapDealer
Are you using that ppa and same driver versions on the Mint 21 machines where Sigil IS working? If so you might want to try a ppa-purge (on the problem machine) and make sure everything works with the stock opensource driver. If so start over with installing the latest radeon driver from the ppa.
I'm not familiar with an official Radeon ppa for their proprietary drivers, but there is a ppa for newer versions of the opensource driver:
ppa  ibaf/graphics-drivers
If you can't get it working with the ppa you're using, you may want to try it out. Easy enough to roll back with ppa-purge after.
$ sudo apt install ppa-purge
$ sudo ppa-purge ppa ibaf/graphics-drivers |
The other 2 machines do not have an AMD video card so they don't use the Radeon ppa.
I have used oibaf ppa in the past and since it gives the latest drivers available it may cause some problems sometimes. May see what it recommends to update and give it a try with the mesa drivers (though it kind of worries me messing things even more)