Extra care is required with kwin-x11 and the X11 session file

[Vlad Zahorodnii]

Hi,

As you probably already know, we split Xorg and Wayland code-bases in 
KWin in 6.4. Both kwin_wayland and kwin_x11 are co-installable. But the 
final decision what should be installed is left to the distributions. We 
would like to bring one case to your attention where you need to be careful.

If a distribution decides to install both kwin_wayland and kwin_x11 by 
default, no extra care is required.

However, if a distribution installs only kwin_wayland by default 
(reflecting their default desktop environment policy), something needs 
to be done about the X11 session desktop file otherwise the user may 
find themselves in a situation where they log in to the Xorg session but 
there are no decorations, etc. We would like to suggest that such a 
distribution puts the X11 session desktop file in a separate package, 
which also depends on kwin-x11. If a user wants to run X11 session, 
they'll have to install that session package. For example, in the past, 
distributions like Arch did something like that but with the wayland 
session. Another possible option is to have the user intervene during 
the update process, but it depends on the distro and its policies.

Regards,
Vlad