Hi everybody, I have tested it on my XFCE system to decrease the DPI value to e.g. 80 and then I can confirm that FreeCAD's menus and toolbars are unusable. Looking through the code I found this line
QGuiApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);
After commenting it out the problem is gone.
The line once has been added with https://github.com/FreeCAD/FreeCAD/pull/4605 and is supposed to fix a scaling problem on Windows. As a proper fix I suggest to enable this line for Windows only:
#if QT_VERSION >= QT_VERSION_CHECK(5,14,0) && defined(Q_OS_WIN) QGuiApplication::setHighDpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy::PassThrough); #endif
Btw, FreeCAD built with Qt6 doesn't seem to suffer from this problem. I hope this helps. BR, Werner
