fvwm on Debian 12: Modules do not start. How to debug ?

["Thomas Schmitt" <scdbackup@gmx.net>]

Hi,

after the striking success with my previous vim problem, i want to
tackle another nuisance of the 11-to-12 upgrade.

The window manager fvwm2 does not start the Modules and does not produce
the Buttons which are prescribed by my ~/.fvwm2rc . I am direly missing
FvwmPager for my 8x2 multi-desktop and FvwmButtons for my xterm-making
button.
I have to run a script for new xterms and to move a little xterm window
to squeeze my way through the borders between the desktop screens.
(There were key combinations to change desktops. But i forgot them.)

So how could i debug the start of fvwm Modules ?
Is there any log file or configuration option ?

-----------------------------------------------------------------------
Configuration and observations:

My init function is

  AddToFunc InitFunction
   +      "I"     Module FvwmBanner
   +      "I"     Exec xterm -ls -geometry +150+85
   +      "I"     Module FvwmButtons
   +      "I"     Exec xli -onroot -fillscreen -border /usr/share/X11/fvwm2/pixmaps/slate.gif
   +      "I"     Module FvwmCommandS

To my luck the "Exec xterm" works and gives me a starting point for more
xterms and other programs.

The pager is probably (*) started by

  *FvwmButtons (2x1 Frame 0 Swallow(UseOld) "FvwmPager" "Module FvwmPager 0 0")

so one could suspect that only the module FvwmButtons is broken.
But i have a menu with module start commands which do not work either:

  AddToMenu modules_popup "Modules"   Title
   ...
   + "Buttons"             Module FvwmButtons
   ...
   + "Command"             Module FvwmCommand
   ...
   + "Console"             Module FvwmConsole
   ...
   + "Pager"               Module FvwmPager 0 0
   ...

(*) My .fvwm2rc is more than 20 years old and was inherited from SuSE.
    So i do not remember or did never learn many things which it does.

I remember to have seen "Fvwm..." processes in the output of "ps".
Currently i see only
  fvwm2
  /usr/bin/ssh-agent fvwm2

(I don't know what ssh-agent has to do with fvwm2. But i have seen it in
the "ps" listings in the past. "dbus" was involved, too. But that might
have been a while ago.)


Have a nice day :)

Thomas