Sorry if i am coming back to task-lxde-desktop:

Finally - and i really do not understand how, but anyway - i succeeded
installin devuan ascii on qemu. I did not install any desktop, but
started from the base installation and installed manually xorg, jwm,
menu and lxdm. Now, looking for lxsession-logout tool (which i did not
find btw!?!?) i checked task-lxde-desktop and i see it pulls in lots of
dependencies which imho are *NOT* needed:

- yelp
- yelp-xsl
- gnome-user-guide
- gnome-desktop3-data
- gnome-disk-utility
- gnome-icon-theme
- gnome-system-tools

is what i note at a first glance (gnome-orca is there too, but i'm not
aware of an alternative). Very likely, there are others too ...

Cheers.