diff --git a/src/slic3r/GUI/GUI_App.cpp b/src/slic3r/GUI/GUI_App.cpp
index a49509db1..3e82d6a3c 100644
--- a/src/slic3r/GUI/GUI_App.cpp
+++ b/src/slic3r/GUI/GUI_App.cpp
@@ -669,7 +669,13 @@ wxGLContext* GUI_App::init_glcontext(wxGLCanvas& canvas)
 
 bool GUI_App::init_opengl()
 {
+#ifdef __linux__
+    bool status = m_opengl_mgr.init_gl();
+    m_opengl_initialized = true;
+    return status;
+#else
     return m_opengl_mgr.init_gl();
+#endif
 }
 
 void GUI_App::init_app_config()
@@ -916,7 +922,14 @@ bool GUI_App::on_init_inner()
         this->obj_manipul()->update_if_dirty();
 
         static bool update_gui_after_init = true;
+
+        // An ugly solution to GH #5537 in which GUI_App::init_opengl (normally called from events wxEVT_PAINT
+        // and wxEVT_SET_FOCUS before GUI_App::post_init is called) wasn't called before GUI_App::post_init and OpenGL wasn't initialized.
+#ifdef __linux__
+        if (update_gui_after_init && m_opengl_initialized) {
+#else
         if (update_gui_after_init) {
+#endif
             update_gui_after_init = false;
 #ifdef WIN32
             this->mainframe->register_win32_callbacks();
diff --git a/src/slic3r/GUI/GUI_App.hpp b/src/slic3r/GUI/GUI_App.hpp
index db9f743cc..8aceb7a69 100644
--- a/src/slic3r/GUI/GUI_App.hpp
+++ b/src/slic3r/GUI/GUI_App.hpp
@@ -109,6 +109,9 @@ private:
     bool            m_app_conf_exists{ false };
     EAppMode        m_app_mode{ EAppMode::Editor };
     bool            m_is_recreating_gui{ false };
+#ifdef __linux__
+    bool            m_opengl_initialized{ false };
+#endif
 
     wxColour        m_color_label_modified;
     wxColour        m_color_label_sys;
@@ -251,7 +254,7 @@ public:
 	RemovableDriveManager* removable_drive_manager() { return m_removable_drive_manager.get(); }
 	OtherInstanceMessageHandler* other_instance_message_handler() { return m_other_instance_message_handler.get(); }
     wxSingleInstanceChecker* single_instance_checker() {return m_single_instance_checker.get();}
-    
+
 	void        init_single_instance_checker(const std::string &name, const std::string &path);
 	void        set_instance_hash (const size_t hash) { m_instance_hash_int = hash; m_instance_hash_string = std::to_string(hash); }
     std::string get_instance_hash_string ()           { return m_instance_hash_string; }