How to run application on Wayland?

charnik · November 23, 2021, 3:59pm

app warns but running ok:


Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.

so i tried this:


export QT_QPA_PLATFORM=wayland

now app warns and dont run, with this message:

Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
qt.qpa.plugin: Could not find the Qt platform plugin "wayland" in ""
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)

i found this info but could not find any solution to this…

https://fedoraproject.org/wiki/Changes/Qt_Wayland_By_Default_On_Gnome

grumpey · November 23, 2021, 4:18pm

What application, and is this regular or flatpak?

Thanks

charnik · November 23, 2021, 4:22pm

bitcoin-core manually installed on /usr/local/bin

grumpey · November 23, 2021, 4:25pm

github.com/bitcoin/bitcoin

[Linux] Add wayland support

opened 10:18AM - 13 Sep 20 UTC

A6GibKm

Feature GUI Linux/Unix

**Is your feature request related to a problem? Please describe.** - Wayland p…rovides extra security as apps can't have access to windows from other apps - X apps looks blurry using fractional scaling on GNOME. - X is mostly unmaintained, in favour of Wayland **Describe the solution you'd like** Add Wayland support to precompiled binaries. **Additional context** As far as I understand wayland is supported on the KDE 5.15 runtime. Currently running with `QT_QPA_PLATFORM="wayland"` results in ``` This application failed to start because it could not find or load the Qt platform plugin "wayland" in "". Available platform plugins are: xcb. Reinstalling the application may fix this problem. ```

Some additional info about building with wayland support here

jakfrost · November 23, 2021, 5:11pm

Yeah, I think QT is still not so Wayland friendly. It may be okay with xwayland, but it definitely likes X better.

hhlp · November 23, 2021, 6:49pm

@charnik Please do the following, If you want to remove the variable from the exported list as well as remove its assigned value, use the unset option:

unset QT_QPA_PLATFORM

and try again to run the application in console to check the logs:

flatpak run org.bitcoincore.bitcoin-qt

Regards.,

pdestefa · March 10, 2022, 6:04pm

Okay, I think I’m running into a similar issue with Zoom, and possibly other programs.

I’m not setting QT_QPA_PLATFORM, but the system sets it to ‘wayland’ … even when I’m using Xorg (GNOME on Xorg login option). In that sitaution, XDG_SESSION=x11, but QT_QPA_PLATFORM=wayland. I don’t think this is right. Can someone explain?

If you have to use Zoom, you probably are aware of the company’s failure to plan for Wayland over the last 5 years. So, Zoom doesn’t actually fully support Wayland, but it runs on both Xorg and Wayland…until very recently. Zoom broke right after the latest version was released, so I suspect they started paying attention to QT_QPA_PLATFORM and, because that is incorrectly (?) set on Xorg, it Zoom crashes immediately on start. It may also be breaking other QT applications. When I simply unset QT_QPA_PLATFORM, Zoom starts fine.