--- a/eric6/Globals/__init__.py Mon Feb 01 10:38:43 2021 +0100 +++ b/eric6/Globals/__init__.py Tue Mar 02 17:12:08 2021 +0100 @@ -164,7 +164,7 @@ if not isLinuxPlatform(): return "" - sessionType = os.environ.get("XDG_SESSION_TYPE").lower() + sessionType = os.environ.get("XDG_SESSION_TYPE", "").lower() if "x11" in sessionType: return "X11" elif "wayland" in sessionType: