• Fabian Vogt's avatar
    Also disable automatic scaling on Qt >= 5.14 · ea66bff2
    Fabian Vogt authored
    Summary:
    Applications which set `Qt::AA_EnableHighDpiScaling` use the DPI of the monitor the window is on to calculate an additional scaling factor.
    Plasma sets `QT_SCREEN_SCALE_FACTORS` in the environment for manual specification of per-monitor scale, which combined with the automatic scaling may result in double scaling.
    To disable the automatic scaling, `QT_AUTO_SCREEN_SCALE_FACTOR=0` has to be set, even on Qt 5.14.
    
    As a side effect, this works around QTBUG-80967 as well.
    
    BUG: 415421
    
    Test Plan: On X11, with a >144dpi monitor and a scaling factor of 2 set manually, scaling was doubled previously. Now it works as expected.
    
    Reviewers: #plasma, apol, davidedmundson, fvogt
    
    Reviewed By: #plasma, davidedmundson, fvogt
    
    Subscribers: acooligan, fvogt, asturmlechner, dfaure, davidedmundson, anthonyfieroni, plasma-devel
    
    Tags: #plasma
    
    Differential Revision: https://phabricator.kde.org/D26185
    ea66bff2
startplasma.cpp 15.5 KB