Recently I came across a problem where virt-viewer a program which provides a viewer for virtual machines would suddenly crash.
I was able to reproduce this a couple of times so I looked into it trying to research the root cause problem.
In the terminal I noticed the below:
(virt-viewer:8795): virt-viewer-WARNING **: 07:26:13.285: (virt-viewer-app.c:840):viewer_window_focus_out_cb: runtime check failed: (self->priv->focused >= 0)
Gdk-Message: 07:27:13.932: Error flushing display: Resource temporarily unavailable
On further research I noticed that other apps also had the error. It appears that Wayland causes this crash.
Heres a workaround:
run the app in terminal with:
env GDK_BACKEND=x11
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