VirtualBox context menus disappear about xpra HOT 11 OPEN

Works fine on Fedora with Gnome - could be some incompatibility with KDE.

from xpra.

.. and then get a terminal on it (e.g. DISPLAY=:101 konsole)

Don't do that.
Use --start=konsole to get the correct environment setup.

from xpra.

Thanks for the advice, now using --start. Does not change the issue with the floating context menus, though. Might indeed be plasma specific or even plasma 6 specific or plasma 6 on wayland specific.

from xpra.

Does not change the issue with the floating context menus

I didn't think it would. That's a separate issue.

plasma 6 on wayland specific

Yes, that's likely.
Wayland makes all sorts of window positioning issues "interesting".

from xpra.

Also reported at KDE https://bugs.kde.org/show_bug.cgi?id=488208

from xpra.

Seems 100% reproducible for me, so I hope they can check it.

from xpra.

@callegar they're probably going to say that xpra is at fault.

from xpra.

Even if it was, which may well not be, I hope they will help by looking into it. xpra is a too important piece for having it misbehave in KDE, IMHO. Furthermore, the post X era where each DE has its own implementation of the wayland protocols really requires a lot of cooperation to assure that things remain consistent across desktops.

from xpra.

Issue is actually not limited to VirtualBox. I see a similar behavior with konsole. If I go on the sandwich button and press it, then a menu appears. When I try to show a submenu, the submenu flashes and disappears. At the same time I get messages such as:

(Xpra:54999): Gdk-WARNING **: 16:14:13.755: Couldn't map as window 0x620b98e10110 as popup because it doesn't have a parent

(Xpra:54999): Gdk-WARNING **: 16:14:18.089: Tried to map a popup with a non-top most parent

(Xpra:54999): Gdk-WARNING **: 16:14:20.503: Tried to map a popup with a non-top most parent
Gdk-Message: 16:14:33.630: Window 0x620b98e29c30 is a temporary window without parent, application will not be able to position it on screen.

from xpra.

In any case, forcing the xpra client to work in X11 mode rather than in wayland mode works around the issue. Enough to do GDK_BACKEND=x11 xpra attach --ssh=ssh --dpi <dpi> ssh://<host>/<display> --start konsole.

from xpra.

I see a similar behavior with konsole

Works fine here on Fedora + Gnome Shell.

The problem comes from this:
Window 0x620b98e29c30 is a temporary window without parent, application will not be able to position it on screen.

X11 applications routinely place their windows wherever they like, but Wayland decided to break the vast majority of existing applications by not providing an API for doing that (it does exist, as can be seen when using XWayland).
We try hard to find a parent:

from xpra.