Bug#793997: kwin-x11: kwin is not started

[Brendon Higgins <brendon@quantumfurball.net>]

This doesn't seem to be fixed. I now have three separate machines, all tracking 
testing with a sprinkle of unstable packages (which includes those for kwin 
and kde-window-manager), none of which run kwin_x11 at login. They do all have 
the correct x-window-manager alternative set, and I can manually start 
kwin_x11 after login.

>From my investigation, the problem is that ksmserver, which is what starts the 
window manager, by default attempts to find the "kwin" binary, but this binary 
no longer exists. Evidence for this is that I see 'KSMServer::wmProcessChange: 
Window manager "kwin" failed to launch' in my .xsession-errors file, and 
examining the source code (http://api.kde.org/4.x-api/workspace-apidocs/plasma-workspace/html/ksmserver_2startup_8cpp_source.html, lines 233 
and 234) suggests this really is the name of the binary ksmserver is looking 
for.

If correct, I should be able to work around the issue by (as root) creating a 
link /usr/bin/kwin that points to kwin_x11. Indeed, I just checked, and that 
does appear to work.

Peace,
Brendon