Fix hscroll suspension after cursor motion

* src/xdisp.c (hscroll_window_tree): Trigger a thorough redisplay
of the window when temporary suspension of hscrolling is
disabled.  (Bug#29002)

1 files changed, 9 insertions, 2 deletions

diff --git a/src/xdisp.c b/src/xdisp.c
index dc23959aadb..b8bb6ba8dfc 100644
--- a/src/xdisp.c
+++ b/src/xdisp.c
@@ -13174,8 +13174,15 @@ hscroll_window_tree (Lisp_Object window)
 
           /* If the position of this window's point has explicitly
              changed, no more suspend auto hscrolling.  */
-          if (NILP (Fequal (Fwindow_point (window), Fwindow_old_point (window))))
-            w->suspend_auto_hscroll = false;
+          if (w->suspend_auto_hscroll
+              && NILP (Fequal (Fwindow_point (window),
+                               Fwindow_old_point (window))))
+            {
+              w->suspend_auto_hscroll = false;
+              /* Force thorough redisplay of this window, to show the
+                 effect of disabling hscroll suspension immediately.  */
+              SET_FRAME_GARBAGED (XFRAME (w->frame));
+            }
 
           /* Remember window point.  */
           Fset_marker (w->old_pointm,