(display-time): Force use of pipe, not pty.

1 files changed, 7 insertions, 4 deletions

diff --git a/lisp/time.el b/lisp/time.el
index fe3df1f99ac..5df6c5eaad9 100644
--- a/lisp/time.el
+++ b/lisp/time.el
@@ -72,10 +72,13 @@ After each update, `display-time-hook' is run with `run-hooks'."
               (setq global-mode-string
                     (append global-mode-string '(display-time-string))))
           (setq display-time-string "")
-          (setq display-time-process
-                (start-process "display-time" nil
-                               (expand-file-name "wakeup" exec-directory)
-                               (int-to-string display-time-interval)))
+          ;; Using a pty is wasteful, and the separate session causes
+          ;; annoyance sometimes (some systems kill idle sessions).
+          (let ((process-connection-type nil))
+            (setq display-time-process
+                  (start-process "display-time" nil
+                                 (expand-file-name "wakeup" exec-directory)
+                                 (int-to-string display-time-interval))))
           (process-kill-without-query display-time-process)
           (set-process-sentinel display-time-process 'display-time-sentinel)
           (set-process-filter display-time-process 'display-time-filter)))))