[kde] [Bug 485803] New: QTWebEngine Apps Are Unresponsive on Nvidia and Wayland

[Elliot Lurie]

https://bugs.kde.org/show_bug.cgi?id=485803

            Bug ID: 485803
           Summary: QTWebEngine Apps Are Unresponsive on Nvidia and
                    Wayland
    Classification: I don't know
           Product: kde
           Version: unspecified
          Platform: Fedora RPMs
                OS: Linux
            Status: REPORTED
          Severity: crash
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: elliotlurie at mailo.com
  Target Milestone: ---

SUMMARY
Applications using qtwebengine (say, kmail) unresponsive on startup when
launched on Wayland with Nvidia without using XWayland (running with
QT_QPA_PLATFORM=xcb).

STEPS TO REPRODUCE
1.  Launch Plasma Wayland Session
2.  Launch Kmail

OBSERVED RESULT
Window is unresponsive, though process itself does not crash when launched via
a terminal.

EXPECTED RESULT
Window accepts inputs and functions as expected.

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora 40 release candidate/beta
KDE Plasma Version:  6.0.3
KDE Frameworks Version: 6.0.0
Qt Version: 6.6.2

ADDITIONAL INFORMATION
Output when run via terminal:
qt.dbus.integration: Could not connect "org.freedesktop.NetworkManager" to
"stateChanged" : Type not registered with QtDBus in parameter list:
QNetworkManagerInterface::NMState
qt.dbus.integration: Could not connect "org.freedesktop.NetworkManager" to
"connectivityChanged" : Type not registered with QtDBus in parameter list:
QNetworkManagerInterface::NMConnectivityState
qt.dbus.integration: Could not connect "org.freedesktop.NetworkManager" to
"deviceTypeChanged" : Type not registered with QtDBus in parameter list:
QNetworkManagerInterface::NMDeviceType
qt.dbus.integration: Could not connect "org.freedesktop.NetworkManager" to
"meteredChanged" : Type not registered with QtDBus in parameter list:
QNetworkManagerInterface::NMMetered
DRM kernel driver 'nvidia-drm' in use. NVK requires nouveau.

The reference to the specific kernel DRM driver is of note here, as programs
without QTWebEngine do not have this issue nor display such a message.

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