File tightvnc-altgr.patch of Package tightvnc

--- vncviewer/desktop.c
+++ vncviewer/desktop.c
@@ -34,7 +34,7 @@
 Cursor dotCursor;
 Widget form, viewport, desktop;
 
-static Bool modifierPressed[256];
+static CARD32 downKeysym[256];
 
 static XImage *image = NULL;
 
@@ -79,8 +79,10 @@
   XtAddEventHandler(desktop, LeaveWindowMask|ExposureMask,
 		    True, HandleBasicDesktopEvent, NULL);
 
-  for (i = 0; i < 256; i++)
-    modifierPressed[i] = False;
+  for (i = 0; i < 256; i++) {
+    downKeysym[i] = 0;
+  }
+  
 
   CreateImage();
 }
@@ -189,9 +191,9 @@
 
   case LeaveNotify:
     for (i = 0; i < 256; i++) {
-      if (modifierPressed[i]) {
-	SendKeyEvent(XKeycodeToKeysym(dpy, i, 0), False);
-	modifierPressed[i] = False;
+      if (downKeysym[i]) {
+	SendKeyEvent(XKeycodeToKeysym(dpy, downKeysym[i], 0), False);
+	downKeysym[i] = 0;
       }
     }
     break;
@@ -319,15 +321,16 @@
     return;
 
   case KeyPress:
-  case KeyRelease:
     XLookupString(&ev->xkey, keyname, 256, &ks, NULL);
+    downKeysym[ev->xkey.keycode] = ks;
+    SendKeyEvent(ks, True);
+    return;
 
-    if (IsModifierKey(ks)) {
-      ks = XKeycodeToKeysym(dpy, ev->xkey.keycode, 0);
-      modifierPressed[ev->xkey.keycode] = (ev->type == KeyPress);
+  case KeyRelease:
+    if (downKeysym[ev->xkey.keycode]) {
+      SendKeyEvent(downKeysym[ev->xkey.keycode], False);
+      downKeysym[ev->xkey.keycode] = 0;
     }
-
-    SendKeyEvent(ks, (ev->type == KeyPress));
     return;
 
   default: