I found the origin of this bug, and solved it! It is not related to the Qt platform, but to some incompatibility between GPU libraries. On Ubuntu 20.10, I simply uninstalled libegl-amber0 and libglx-amber0, and everything is now OK.
** Summary changed: - Some wayland applications do not launch (QEGLPlatformContext missing) + Some wayland applications do not launch (QEGLPlatformContext missing) [SOLVED] -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2086676 Title: Some wayland applications do not launch (QEGLPlatformContext missing) [SOLVED] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qt6-base/+bug/2086676/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
