DeskProto user forum

I receive the following error message when launching DeskProto71.AppImage on Ubuntu 24.04:

qt.qpa.plugin: Could not find the Qt platform plugin "wayland" in ""
qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: xcb.

Aborted (core dumped)

That's under wayland; when launching from an X11 session:

qt.qpa.plugin: Could not load the Qt platform plugin "xcb" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: xcb.

Aborted (core dumped)

Has anyone else seen this error or have any idea how to proceed?

Hi JMB,

Have you tried the fix that is described on support/faq.php#install15?

We know that this works for older Ubuntu versions.

Lex.

That's what I get for not checking the FAQ. Works perfectly, much appreciated!

Happy to hear that this did the trick.

Just to add... if you have a desktop icon in Ubuntu to launch DeskProto, then you can add this environment variable to the automatic launcher with the 'env' command added to the 'Exec=' line. This works for me:

$ gedit ~/Desktop/deskproto.desktop
...
Exec=env LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libfreetype.so.6 /opt/deskproto/DeskProto71.AppImage
...

Of course you'd have to fiddle with it if anything changed!

Susan, thanks for this handy trick !
I just added a link about this forum issue to the FAQ issue mentioned above.

Cool! That was on a very fresh Ubuntu 24.04.1 installation, by the way, so hopefully they won't move it again for another few years...