Printing doesn't work when MOZ_ENABLE_WAYLAND is set

[kaimast]

I'm not sure if this is a limitation of flatpak. When I try to print an email Thunderbird will just crash.

The crash happens before the printing dialog is shown, so I assume it fails to communicate with CUPS for some reason.

[Erick555]

Yes, it's supported and works just fine for me. What's your distro, desktop environment and flatpak version? I think flatpak 1.8.2 had some fix for cups which may be relevant in some situations.

[kaimast]

Actually, it might be a Wayland error? The only thing Thunderbird prints on the console before crashing is the following:

Gdk-Message: 13:32:47.839: Error 71 (Protocol error) dispatching to Wayland display.

[Erick555]

I didn't tried wayland so it's possible that it doesn't work there. Did you forced TB to run natively on wayland or does it run on xwayland?

[kaimast]

I didn't tried wayland so it's possible that it doesn't work there. Did you forced TB to run natively on wayland or does it run on xwayland?

It's forced to run natively.

[Erick555]

Can you try on xwayland? Maybe it's some app issue.

[ovari]

Have you tried using Flatseal?

In Device, is All devices (e.g. webcam) enabled?

Thank you

[kaimast]

It wasn't enabled on but enabling it did not seem to fix it.

[kaimast]

Can you try on xwayland? Maybe it's some app issue.

Just ran without MOZ_ENABLE_WAYLAND set and it seems to work.

[Erick555]

It may be app issue with wayland then. I wonder if it's reproducible with non-flatpak version.

[ovari]

Can't print on Linux Mint 20.3 Cinnamon. The document never arrive at the printer.

Flatseal shows that the Printing system is enabled

Workaround: Print to PDF and then print the PDF to the printer. Is there a permission that needs to be updated?

Thank you

[Erick555]

@kaimast do you have idea if this issue still occurs with latest release?