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Qt for Python (PySide/Shiboken)

7 December 2025
2025-12-07×
7 December 2025
petrichor waning
Have you encountered the issue where QWebEngine renders at a lower frame rate on high refresh rate displays? I loaded a website, and it displays normally in the browser, but in QWebEngine, the frame rate drops significantly, only around 60fps
# QApplication.setAttribute(Qt.ApplicationAttribute.AA_UseDesktopOpenGL) QApplication.setAttribute(Qt.ApplicationAttribute.AA_UseOpenGLES) QApplication.setAttribute(Qt.ApplicationAttribute.AA_ShareOpenGLContexts) # os.environ["QTWEBENGINE_CHROMIUM_FLAGS"] = ( # "--ignore-gpu-blacklist " # "--enable-gpu-rasterization " # "--enable-zero-copy " # "--num-raster-threads=4" # "--disable-pinch" # ) from PySide6.QtQuick import QQuickWindow, QSGRendererInterface
P
I tried many methods, but unfortunately, they didn't work
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Kian T.
Hi everyone. I have a pyside6 app for signal processing with interactive plots using pyqtgraph. On windows there is no problem at all. But on ubuntu, it can not show the plots that have too many points , like 60000 points in a plot, or even more. Can I do something to solve it or it is what it is?
A
Anton Yablokov
Hi, J. I bet the developers of PyQtGraph would be of better help for you. Either the problem roots from Qt (not PySide) or from PyQtGraph. Anyway, provide a minimal example that reproduces the issue.
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Keith Kyzivat
Kian T.Hi everyone. I have a pyside6 app for signal processing with interactive plots using pyqtgraph. On windows there is no problem at all. But on ubuntu, it can not show the plots that have too many points , like 60000 points in a plot, or even more. Can I do something to solve it or it is what it is?
I don't know anything about pyqtgraph, so I can't help you there. Try porting your graphing logic to Qt Graphs (newer QML module added in Qt 6.6 as TP, out of TP in 6.8) It's designed for higher performance than Qt Charts ever could achieve.. Not sure how it compares to pyqtgraph.
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