Thank you for your pointer.
Unfortunately I have already uninstalled xorg-server, xinit. I can't try it
soon.
I have another problem for LXDE and LXQT with slim login manager.
I'm using uim-anthy for japanese input but slim can't read xprofile so
I use xsession script to set environment variable such as XMODIFIER,
GTK_IM_MODULE.
I can select desktop with slim but can't use uim-anthy without xsession.
Also I did system reconfigure to install LXDE, LXQT. Its package field
is as follows,
(packages (cons* fluxbox cwm ;window managers
lxde lxqt ;desktop
nss-certs ;for HTTPS access
%base-packages))
There are many desktop file in
/run/current-system/profile/share/xsessions.
LXDE.desktop fluxbox.desktop openbox-gnome.desktop openbox.desktop
cwm.desktop lxqt.desktop openbox-kde.desktop
This is not problem but wonder a little.