[Python] Cannot Drag Dock Widgets PySide6 Ubuntu 22.04

I'm developing a GUI using PySide6 and experiencing an issue with QDockWidgets on Linux Ubuntu 22.04. The dock widgets initialize correctly, but I cannot drag it to a new location. I can click on the header and then move my mouse to another dock location and drop it, but I would like to be able to drag it around as if it was it's own window. I can do this in Windows 11 with no issues, same exact code, but for whatever reason it does not work on Ubuntu.

Environment


OS: Ubuntu Linux 22.04 (using Python 3.10.12) Works correctly on: Windows 11 (using Python 3.11.9) (I have tried using a venv on Ubuntu to change the Python version, still no luck) PySide6 version: 6.9.0

Reproduction


Create a QMainWindow with QDockWidgets Try to drag the dock by the title bar

When I try to grab the title bar of a dock widget, I get an error in the console:

This plugin supports grabbing the mouse only for popup windows.

Minimal Example For Reproduction


Here is a code sample that demostrates the issue.

import sys
from PySide6.QtWidgets import (QApplication, QMainWindow, QDockWidget,
QTextEdit, QLabel, QVBoxLayout, QWidget)
from PySide6.QtCore import Qt

class MainWindow(QMainWindow):
def __init__(self):
super().__init__()
self.setWindowTitle("QDockWidget Test")
self.resize(800, 600)

# Central widget
central_widget = QWidget()
central_layout = QVBoxLayout(central_widget)
central_layout.addWidget(QLabel("Central Widget"))
self.setCentralWidget(central_widget)

# Create dock widgets
self.terminal_dock = QDockWidget("Terminal", self)
self.terminal_dock.setObjectName("terminal_dock")
self.terminal_dock.setAllowedAreas(Qt.AllDockWidgetAreas)
terminal_content = QTextEdit()
terminal_content.setReadOnly(True)
terminal_content.setStyleSheet("background-color: black; color: white;")
terminal_content.setText("$ Terminal (Placeholder)\n$ _")
self.terminal_dock.setWidget(terminal_content)
self.addDockWidget(Qt.BottomDockWidgetArea, self.terminal_dock)

# Additional dock widget
self.info_dock = QDockWidget("Info Panel", self)
self.info_dock.setObjectName("info_dock")
self.info_dock.setAllowedAreas(Qt.AllDockWidgetAreas)
info_content = QWidget()
info_layout = QVBoxLayout(info_content)
info_layout.addWidget(QLabel("Info Panel Content"))
self.info_dock.setWidget(info_content)
self.addDockWidget(Qt.RightDockWidgetArea, self.info_dock)

if __name__ == "__main__":
app = QApplication(sys.argv)
main_window = MainWindow()
main_window.show()
sys.exit(app.exec())


As you can see, you cannot drag the terminal or info panel widgets around.

I have also tried setfeatures(...) to include moving, floating, and closing but it didn't change anything.

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