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  1. Qt
  2. QTBUG-74836

Qt does not use screen scaling set in Gnome

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Details

    • Linux/X11
    • 121692e5408561f486cad5cd170ac8bcd2557eb2 (qt/qtbase/5.12)

    Description

      Running on one single HiDPI screen, I have my Gnome scaled to 200% but Qt does not pick it up correctly and GUIs look bizarre:

      qtdiag writes:

      Screens: 1, High DPI scaling: inactive
# 0 "DP1" Depth: 24 Primary: yes
  Manufacturer: Acer Technologies
  Model: B326HK-
  Serial number: T1NEE0018532-
  Geometry: 3840x2160+0+0 Available: 3732x2100+108+60
  Physical size: 710x400 mm  Refresh: 59 Hz Power state: 0
  Physical DPI: 137.375,137.16 Logical DPI: 192,192 Subpixel_None
  DevicePixelRatio: 1 Pixel density: 1
  Primary orientation: 2 Orientation: 2 Native orientation: 0 OrientationUpdateMask: 0

      If I explicitly set a scaling factor using QT_SCREEN_SCALE_FACTORS=2 GUIs start to look acceptable and qtdiag instead writes:

      Screens: 1, High DPI scaling: active
# 0 "DP1" Depth: 24 Primary: yes
  Manufacturer: Acer Technologies
  Model: B326HK-
  Serial number: T1NEE0018532-
  Geometry: 1920x1080+0+0 (native: 3840x2160+0+0) Available: 1866x1050+54+30
  Physical size: 710x400 mm  Refresh: 59 Hz Power state: 0
  Physical DPI: 68.6873,68.58 Logical DPI: 96,96 (native: 192,192) Subpixel_None
  High DPI scaling factor: 2 DevicePixelRatio: 2 Pixel density: 1
  Primary orientation: 2 Orientation: 2 Native orientation: 0 OrientationUpdateMask: 0

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          duplicates

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-65424 Gnome/X11/HiDPI -> no scaling

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-69136 xwayland: program -geometry uses logical rather than physical coordinates; default window size is wrong (QT_AUTO_SCREEN_SCALE_FACTOR=1)

          • P4: Low - Would be nice to fix, but it's not very important.
          • Reported
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              allan.jensen Allan Sandfeld Jensen
              rlohning Robert Löhning
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                Created:
                Updated:
                Resolved:

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