diff --git a/debian/changelog b/debian/changelog
index ec62cfd7..8b3e6eb6 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,14 @@
+qtbase-opensource-src (5.15.8+dfsg-ok1.6) yangtze; urgency=medium
+
+  * BUG号：
+    #I72DC0:【X】【触摸】【次要】文件管理器界面触控笔偏移
+    #I72CCL:【X】【触摸】触摸屏pc模式下触控笔单击功能失效
+    #I729NF:【X】【触摸】触控笔点击按钮时画面按钮动画卡顿不生效
+  * 需求号：无
+  * 其他更改： 修复 xcb 上高 dpi 时触控笔坐标异常
+
+ -- hanpinlong <hanpinlong@kylinos.cn>  Thu, 25 May 2023 11:15:52 +0800
+
 qtbase-opensource-src (5.15.8+dfsg-ok1.5build1) yangtze; urgency=medium
 
   * BUG号：
diff --git a/debian/patches/0033-update-debian-changelog.patch b/debian/patches/0033-update-debian-changelog.patch
new file mode 100644
index 00000000..9aaeb2c7
--- /dev/null
+++ b/debian/patches/0033-update-debian-changelog.patch
@@ -0,0 +1,66 @@
+From: hanpinlong <hanpinlong@kylinos.cn>
+Date: Thu, 25 May 2023 03:18:13 +0000
+Subject: update debian/changelog.
+
+Signed-off-by: hanpinlong <hanpinlong@kylinos.cn>
+---
+ src/gui/kernel/qplatformwindow.cpp               | 7 +++++++
+ src/gui/kernel/qplatformwindow.h                 | 1 +
+ src/plugins/platforms/xcb/qxcbconnection_xi2.cpp | 8 ++++----
+ 3 files changed, 12 insertions(+), 4 deletions(-)
+
+diff --git a/src/gui/kernel/qplatformwindow.cpp b/src/gui/kernel/qplatformwindow.cpp
+index 7207ff4..dfbd7d5 100644
+--- a/src/gui/kernel/qplatformwindow.cpp
++++ b/src/gui/kernel/qplatformwindow.cpp
+@@ -266,6 +266,13 @@ QPoint QPlatformWindow::mapToGlobal(const QPoint &pos) const
+     return result;
+ }
+ 
++QPointF QPlatformWindow::mapFromGlobalF(const QPointF &pos) const
++{
++    const QPoint posPt = pos.toPoint();
++    const QPointF delta = pos - posPt;
++    return mapFromGlobal(posPt) + delta;
++}
++
+ /*!
+     Translates the global screen coordinate \a pos to window
+     coordinates using native methods. This is required for embedded windows,
+diff --git a/src/gui/kernel/qplatformwindow.h b/src/gui/kernel/qplatformwindow.h
+index 7b85090..a92de4e 100644
+--- a/src/gui/kernel/qplatformwindow.h
++++ b/src/gui/kernel/qplatformwindow.h
+@@ -114,6 +114,7 @@ public:
+     virtual bool isForeignWindow() const { return false; };
+     virtual QPoint mapToGlobal(const QPoint &pos) const;
+     virtual QPoint mapFromGlobal(const QPoint &pos) const;
++    QPointF mapFromGlobalF(const QPointF &pos) const;
+ 
+     virtual void propagateSizeHints();
+ 
+diff --git a/src/plugins/platforms/xcb/qxcbconnection_xi2.cpp b/src/plugins/platforms/xcb/qxcbconnection_xi2.cpp
+index fb2a335..cfff36d 100644
+--- a/src/plugins/platforms/xcb/qxcbconnection_xi2.cpp
++++ b/src/plugins/platforms/xcb/qxcbconnection_xi2.cpp
+@@ -1270,16 +1270,16 @@ void QXcbConnection::xi2ReportTabletEvent(const void *event, TabletData *tabletD
+             if (Q_LIKELY(useValuators)) {
+                 const qreal value = scaleOneValuator(normalizedValue, physicalScreenArea.x(), physicalScreenArea.width());
+                 global.setX(value);
+-                // mapFromGlobal is ok for nested/embedded windows, but works only with whole-number QPoint;
+-                // so map it first, then add back the sub-pixel position
+-                local.setX(window->mapFromGlobal(QPoint(int(value), 0)).x() + (value - int(value)));
++                //! \note Fix QTBUG-77826
++                local.setX(xcbWindow->mapFromGlobalF(global).x());
+             }
+             break;
+         case QXcbAtom::AbsY:
+             if (Q_LIKELY(useValuators)) {
+                 qreal value = scaleOneValuator(normalizedValue, physicalScreenArea.y(), physicalScreenArea.height());
+                 global.setY(value);
+-                local.setY(window->mapFromGlobal(QPoint(0, int(value))).y() + (value - int(value)));
++                //! \note Fix QTBUG-77826
++                local.setY(xcbWindow->mapFromGlobalF(global).y());
+             }
+             break;
+         case QXcbAtom::AbsPressure:
diff --git a/debian/patches/series b/debian/patches/series
index 92641e4d..6e55d730 100644
--- a/debian/patches/series
+++ b/debian/patches/series
@@ -30,3 +30,4 @@ revert_startBlocking_removal.diff
 0030-5-2.patch
 0031-10-changelog.patch
 0032-13-rebuild.patch
+0033-update-debian-changelog.patch