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  1. Qt
  2. QTBUG-136548

QtWebengine dumps core on Plasma/Wayland applications after upgrade from 6.8 -> 6.9

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    • Icon: Bug Bug
    • Resolution: Fixed
    • Icon: P1: Critical P1: Critical
    • 6.9.1
    • 6.9.0
    • WebEngine, WebView
    • None

      ArchLinux: linux technik-b250md3h 6.14.4-arch1-2 #1 SMP PREEMPT_DYNAMIC Tue, 29 Apr 2025 09:23:13 +0000 x86_64 GNU/Linux

      Plasma 6.3.4 / KDE Framework 6.13.0 / Qt 6.9 / Wayland desktop.

      Since update of Qt from 6.8 -> 6.9, all applications using Qt6 WebEngine are dumping core and crashing with the following message in stdout:
      CRITICAL: Failed to query DRM FD for EGL.

      This so far was tested and proven on:

      • qutebrowser v 3.5.0 - with default --qt-wrapper = PyQt6, when switched to PyQt5 the crash does not occur
      • falkon 25.04.0
      • Qt Creator while running an example app: quicknanobrowser

       

      Single display adapter:
      03:00.0 VGA compatible controller: Intel Corporation Battlemage G21 [Arc B580]

      CPU:
      Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz

        1. falkon_core_dump_example.txt
          47 kB
          Leon Lewski
        2. gdb.txt
          34 kB
          Leon Lewski
        3. qutebrowser_PyQt6_coredump.log
          47 kB
          Leon Lewski
        4. eglinfo_wayland.txt
          36 kB
          Leon Lewski
        5. installed_packages.txt
          6 kB
          Leon Lewski
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            pvarga Peter Varga
            lewekleonek Leon Lewski
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              Created:
              Updated:
              Resolved:

                There are no open Gerrit changes