allow systemd-run with Ubuntu >= 22

xpra/scripts/main.py

@@ -34,7 +34,10 @@
     WIN32, OSX, POSIX
 )
 from xpra.util.io import is_socket, stderr_print, use_tty
-from xpra.util.system import is_Wayland, is_Ubuntu, SIGNAMES, set_proc_title, is_systemd_pid1
+from xpra.util.system import (
+    is_Wayland, is_Ubuntu, SIGNAMES,
+    set_proc_title, is_systemd_pid1, get_distribution_version_id,
+)
 from xpra.scripts.parsing import (
     info, warn, error,
     get_usage,
@@ -365,9 +368,19 @@ def use_systemd_run(s) -> bool:
     if systemd_run in (True, False):
         return systemd_run
     # detect if we should use it:
-    if is_Ubuntu() and (os.environ.get("SSH_TTY") or os.environ.get("SSH_CLIENT")):   # pragma: no cover
+    if os.environ.get("SSH_TTY") or os.environ.get("SSH_CLIENT"):   # pragma: no cover
         # would fail
         return False
+    if is_Ubuntu():
+        try:
+            # Ubuntu was broken up until 21.10:
+            # https://github.com/systemd/systemd/issues/3388
+            rel = float(get_distribution_version_id())
+            if rel < 22:
+                return False
+        except ValueError:
+            pass
+        # would fail
     if not is_systemd_pid1():
         return False    # pragma: no cover
     # test it: