我的情况和你相反我是只能启动wayland不能启动x11, 我尝试过很多方法修复, 但都以失败告终, 我用journalctl -b -p err抓到的报错指向了gnome-session-binary.而gnome-session-binary也正是gdmx11的核心
systemd[1640]: Failed to start Application launched by gnome-session-binary.
systemd[1640]: Failed to start Application launched by gnome-session-binary.
systemd[1640]: Failed to start Application launched by gnome-session-binary.
这个是他的报错