Uploaded image for project: 'Qt'
  1. Qt
  2. QTBUG-56104

Wrong Hi-Dpi Scaling with X on Kubuntu

    XMLWordPrintable

Details

    • Bug
    • Resolution: Done
    • P2: Important
    • 5.15
    • 5.8.0 Alpha
    • QPA: X11/XCB
    • Kubuntu 16.04, 4k Hi-Dpi monitor

    Description

      I had issues with Kubuntu and my 4k monitor, is it never saved the display scale factor correctly.
      Thus, I set the X config and .Xresources manually to 192x192 dpi:
      https://www.girialam.com/2016/02/kubuntu-and-hidpi-screen/

      When I started QtCreator, font and window scale was twice as large as expected. The device pixel ratio is set to 2.
      I tested the env variables QT_DEVICE_PIXEL_RATIO and QT_AUTO_SCREEN_SCALE_FACTOR in all combinations (screen shot attached(. The only correct output was achieved with (QT_DEVICE_PIXEL_RATIO=1 (but it was expected to be 2!) and QT_AUTO_SCREEN_SCALE_FACTOR=1).

      QML and QWidget windows seem to scale differently.
      This might be related to https://bugreports.qt.io/browse/QTCREATORBUG-16828

      Attachments

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTCREATORBUG-16828 Gnome/DConf text-scaling-factor affects QtCreator

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed
          No reviews matched the request. Check your Options in the drop-down menu of this sections header.

          Activity

            People

              sorvig Morten Sørvig
              michaelwinkelmann Michael Winkelmann
              Votes:
              0 Vote for this issue
              Watchers:
              5 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved:

                Gerrit Reviews

                  There are no open Gerrit changes