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.