Quote:
Originally Posted by nerdyreader
compositor: gnome-shell v: 45.9 driver: gpu: i915 display-ID: 0
I don't have a separate graphics card, just the built-in graphics on an Intel cpu. I am running Wayland.
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That may be a good chunk of your problems there. Wayland seems to be the cause of many issues for calibre and Linux. I did a snapshot of my Fedora 39 VM and updated to Fedora 40 where Wayland is the default and almost immediately noticed some display oddities when using the viewer (page forward/backward, half the screen is written then the rest gets written after a couple of seconds).
I tried the 'sudo echo "export GSK_RENDERER=gl" > /etc/profile.d/gtk_renderer.sh' command and it added an option in the bottom of the login screen to select some video options. Selecting Plasma with X11 ran the viewer without issue.