Description of problem:
gchem3d and gcrystal does not start
Version-Release number of selected component (if applicable):
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There seems to be a packaging patch for debian (https://salsa.debian.org/debichem-team/gnome-chemistry-utils/-/commit/694931319167f1e9317a3791281491610993b60b) to prevent crashing.
All this patch does is setting GDK_BACKEND=x11 before launching. Could you please test if it works for you? I was not having much success.
Yes. Running `GDK_BACKEND=x11 gcrystal` and `GDK_BACKEND=x11 gchem3d` in the terminal works for me.