[gui] sway: Window contents are not rendered on Wayland backend

[keeakita]

Describe the bug
When run in Sway, psst only displays the background of the window, but none of the contents. This means when first run, it display7s the log in screen as an empty white square. This is Wayland-specific as it doesn't happen when run in XWayland.

To Reproduce

• Build dev version
• cargo run --bin psst-gui

Expected behavior
The contents of the windows should be displayed when using Wayland as the backend.

Screenshots
Log in screen, not working:

Log in screen, XWayland:

After setting up a profile via XWayland and launching via Wayland. Notice it seems to skip log-in, and remembers the user's theme setting:

Environment

• OS: nixos unstable
• Version: master / de5c12f

Additional context

• Working version via XWayland: WAYLAND_DISPLAY= cargo run --bin psst-gui
• Repros on the release build
• I haven't had a chance to try other Wayland-based desktop environments

[jpochyla]

Hi @oslerw, Druid does not yet have a native wayland API. There is a Draft PR pending: linebender/druid#1498

[filmor]

For me it seems to be working just fine on the current master on Wayland (also running sway), no idea how if druid is not there, yet :)

[keeakita]

@filmor -- out of curiosity, what version of Wayland are you running, and on what distro? I can do more testing to try to narrow down why it's reproducible on my system but not yours.

[filmor]

This is Gentoo Linux. The relevant(?) versions are:

Package	Version
sway	1.6.1
wayland	1.19.0

[thebiblelover7]

@oslerw @filmor Psst works perfectly fine for me on GNOME wayland. (I can verify it's running on wayland by running xeyes)
I'm on arch using GNOME on wayland, and this is my wayland and mutter version

wayland 1.20.0-1
mutter 41.2-1

[ToxicMushroom]

isn't this fixed now ?
linebender/druid#2079
and psst is already running with an app_id which means it runs on wayland in my experience.

[dacioromero]

It worked fine on Gnome Wayland, but doesn't for me on KDE Wayland now that I've switched. I'm also running NixOS.

Since druid uses some GTK stuff I was able to force XWayland with GDK_BACKEND=x11.

[arch-btw]

Strange, it's working on Wayland for me.

Can those affected please provide the output of:

echo $GDK_BACKEND:$WAYLAND_DISPLAY:$DISPLAY:$XDG_RUNTIME_DIR

And does the following command make it work how it should?

GDK_BACKEND=wayland psst-gui

[skykanin]

I'm also running into this issue on Hyprland using psst version unstable-2023-05-13.
System: Linux 6.5.2, NixOS, 23.11 (Tapir), 23.11.20230911.3a2786e

$ echo "$GDK_BACKEND:$WAYLAND_DISPLAY:$XDG_RUNTIME_DIR"
wayland:wayland-1:/run/user/1000