From 257dd0b3da86e24b7edce78b3a21a50c5eeaa5d1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tom=C3=A1=C5=A1=20Joz=C3=ADfek?= <jozifektomas@gmail.com>
Date: Wed, 19 Jul 2023 14:52:26 +0200
Subject: [PATCH] Fix MK2(.5) SN not working on multi-instance images

---
 ChangeLog                           | 1 +
 prusa/link/serial/serial_adapter.py | 4 +++-
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index 77d895d1..34252504 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -23,6 +23,7 @@
         - Hide zero temperatures in telemetry
         - Add support to be running behind the proxy
     * Hold the STOPPED and FINISHED state for at least 11s
+    * Fix MK2(.5)S SN being broken on multi-instance images
 
 0.7.0 (2023-05-19)
     * Fixed printer sends info about api key change to Connect after change
diff --git a/prusa/link/serial/serial_adapter.py b/prusa/link/serial/serial_adapter.py
index 4bb6473a..f85f4027 100644
--- a/prusa/link/serial/serial_adapter.py
+++ b/prusa/link/serial/serial_adapter.py
@@ -195,7 +195,9 @@ def _reopen(self) -> bool:
                 paths.extend(glob.glob("/dev/ttyACM*"))
                 paths.extend(glob.glob("/dev/ttyUSB*"))
             else:
-                paths = [self.configured_port]
+                # Follow symlinks to the real device file
+                device_path = os.path.relpath(self.configured_port)
+                paths = [device_path]
 
             # Pair the usb printer paths with their serial numbers
             usb_printers = {