From dd7fcd633a5dc09591cecb73cef5e99e7e22db73 Mon Sep 17 00:00:00 2001
From: Jiang Wu <wujiang@kylinos.cn>
Date: Thu, 19 May 2022 15:02:01 +0800
Subject: [PATCH] xcb: clear m_singlescreen before update

Change-Id: Iafff57be82b5beb1f5702c00e0b6d7d0dd3ccdc2
Reviewed-by: Liang Qi <liang.qi@qt.io>
(cherry picked from commit fd9aeb1b38e1b42d497723457317ba1b0cfeef8e)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/plugins/platforms/xcb/qxcbscreen.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/plugins/platforms/xcb/qxcbscreen.cpp b/src/plugins/platforms/xcb/qxcbscreen.cpp
index bb33f393ecb..9179b1ca993 100644
--- a/src/plugins/platforms/xcb/qxcbscreen.cpp
+++ b/src/plugins/platforms/xcb/qxcbscreen.cpp
@@ -598,6 +598,7 @@ void QXcbScreen::setMonitor(xcb_randr_monitor_info_t *monitorInfo, xcb_timestamp
     m_crtcs.clear();
     m_output = XCB_NONE;
     m_crtc = XCB_NONE;
+    m_singlescreen = false;
 
     if (!monitorInfo) {
         m_monitor = nullptr;