We try very hard to ensure that despite the fact that all the windows we forward will be owned by the same xpra process, we set a different group-leader (see "get_group_leader"), we forward the wm-class and the window icon. Unfortunately, gnome-shell will use the first icon we set for all the windows.. Can be tested easily with this standalone app: test_window_icons.py
There could be other window managers that do the wrong thing here, but gnome-shell is the only one I am aware of. Tested: Ubuntu's Unity, MS Windows, KDE, etc.. no problem with any of those. (macos, as usual, does its own thing: only one dock entry.. which we could change when a different application gets focus?)
This may require submitting a patch upstream..
I believe this is no longer the case since #1144, will re-check.
Still a problem. All the window properties are set correctly, but gnome-shell uses something else... sigh.
Fixed in r17250: we create a fake process for each server-side pid, this ensures that gnome-shell does the right thing. We can later use it for handling client-side signals sent to the process owning a window: #1671.
Found some references along the way:
_GTK_APPLICATION_IDto a unique string, but that didn't have any effect and would interfere with menu forwarding
r17272: missing man page
r17362: minor cleanup in and avoid trying on macos
missed Debian packaging: r17598
this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/1350