diff --git a/libs/pyTermTk/TermTk/TTkCore/drivers/term_unix_common.py b/libs/pyTermTk/TermTk/TTkCore/drivers/term_unix_common.py
index c0dc5059..f74e678c 100644
--- a/libs/pyTermTk/TermTk/TTkCore/drivers/term_unix_common.py
+++ b/libs/pyTermTk/TermTk/TTkCore/drivers/term_unix_common.py
@@ -127,6 +127,7 @@ class _TTkTerm(TTkTermBase):
     def _registerResizeCb(callback:Callable[[int,int],None]) -> None:
         _TTkTerm._sigWinChCb = callback
         # Dummy call to retrieve the terminal size
+        # signal only works in main thread of the main interpreter
         _TTkTerm._sigWinCh(signal.SIGWINCH, None)
         signal.signal(signal.SIGWINCH, _TTkTerm._sigWinCh)
     TTkTermBase.registerResizeCb = _registerResizeCb
diff --git a/libs/pyTermTk/TermTk/TTkCore/drivers/unix.py b/libs/pyTermTk/TermTk/TTkCore/drivers/unix.py
index 696daa00..577df26e 100644
--- a/libs/pyTermTk/TermTk/TTkCore/drivers/unix.py
+++ b/libs/pyTermTk/TermTk/TTkCore/drivers/unix.py
@@ -23,7 +23,7 @@
 __all__ = ['TTkSignalDriver','TTkInputDriver']
 
 import sys, os, re
-import signal
+import atexit, signal
 from select import select
 
 try: import fcntl, termios, tty
@@ -84,6 +84,7 @@ class TTkSignalDriver():
         signal.signal(signal.SIGCONT, TTkSignalDriver._SIGCONT) # Resume
         signal.signal(signal.SIGINT,  TTkSignalDriver._SIGINT)  # Ctrl-C
 
+    @atexit.register
     def exit():
         signal.signal(signal.SIGINT,  signal.SIG_DFL)
 
diff --git a/libs/pyTermTk/TermTk/TTkCore/ttk.py b/libs/pyTermTk/TermTk/TTkCore/ttk.py
index 479b0385..41b3b66c 100644
--- a/libs/pyTermTk/TermTk/TTkCore/ttk.py
+++ b/libs/pyTermTk/TermTk/TTkCore/ttk.py
@@ -151,9 +151,10 @@ class TTk(_TTkRootContainer):
         TTkSignalDriver.sigStop.connect(self._SIGSTOP)
         TTkSignalDriver.sigCont.connect(self._SIGCONT)
         TTkSignalDriver.sigInt.connect( self._SIGINT)
+        TTkSignalDriver.init()
+
         self._drawMutex = threading.Lock()
         self._paintEvent = threading.Event()
-        self._paintEvent.set()
         self.setFocusPolicy(TTkK.ClickFocus)
         self.hide()
         w,h = TTkTerm.getTerminalSize()
@@ -167,6 +168,7 @@ class TTk(_TTkRootContainer):
             self._showMouseCursor = True
 
         TTkHelper.registerRootWidget(self)
+        TTkTerm.registerResizeCb(self._win_resize_cb)
 
     frame = 0
     time = time.time()
@@ -200,13 +202,7 @@ class TTk(_TTkRootContainer):
             TTkLog.debug( "Starting Main Loop..." )
             TTkLog.debug(f"screen = ({TTkTerm.getTerminalSize()})")
 
-            # Register events
-            TTkSignalDriver.init()
-
-            TTkLog.debug("Signal Event Registered")
-
-            TTkTerm.registerResizeCb(self._win_resize_cb)
-
+            self._paintEvent.set()
             self._timer.timeout.connect(self._time_event)
             self._timer.start(0.1)
             self.show()
@@ -231,7 +227,6 @@ class TTk(_TTkRootContainer):
                 TTkHelper.quitEvent.emit()
                 self._quit_timer()
                 self._timer.join()
-                TTkSignalDriver.exit()
                 self.quit()
                 TTkTerm.exit()
                 for e in self._exceptions:
diff --git a/tools/check.import.sh b/tools/check.import.sh
index 84849a1d..e43dbe82 100755
--- a/tools/check.import.sh
+++ b/tools/check.import.sh
@@ -66,7 +66,7 @@ __check(){
             -e "drivers/_unused_.unix_thread.py:import threading" \
             -e "drivers/_unused_.unix_thread.py:import queue" \
             -e "drivers/unix.py:import sys, os, re" \
-            -e "drivers/unix.py:import signal" \
+            -e "drivers/unix.py:import atexit, signal" \
             -e "drivers/unix.py:from select import select" \
             -e "drivers/windows.py:import signal" \
             -e "drivers/windows.py:from ctypes import Structure, Union, byref, wintypes, windll" \