$HOME/.xinitrc

#!/bin/sh
#
# ~/.xinitrc
#
# Executed by startx (run your window manager from here)

userresources=$HOME/.Xresources
usermodmap=$HOME/.Xmodmap
sysresources=/etc/X11/xinit/.Xresources
sysmodmap=/etc/X11/xinit/.Xmodmap

DEFAULT_SESSION=startplasma-x11

# xrandr
xrandr --setprovideroutputsource modesetting NVIDIA-0
xrandr --auto

# merge in defaults and keymaps

if [ -f $sysresources ]; then
    xrdb -merge $sysresources
fi

if [ -f $sysmodmap ]; then
    xmodmap $sysmodmap
fi

if [ -f "$userresources" ]; then
    xrdb -merge "$userresources"
fi

if [ -f "$usermodmap" ]; then
    xmodmap "$usermodmap"
fi

# start some nice programs

if [ -d /etc/X11/xinit/xinitrc.d ] ; then
    for f in /etc/X11/xinit/xinitrc.d/?*.sh ; do
        [ -x "$f" ] && . "$f"
    done
    unset f
fi

get_session(){
    local dbus_args=(--sh-syntax --exit-with-session)
    case $1 in
        awesome) dbus_args+=(awesome) ;;
        bspwm) dbus_args+=(bspwm-session) ;;
        budgie) dbus_args+=(budgie-desktop) ;;
        cinnamon) dbus_args+=(cinnamon-session) ;;
        deepin) dbus_args+=(startdde) ;;
        enlightenment) dbus_args+=(enlightenment_start) ;;
        fluxbox) dbus_args+=(startfluxbox) ;;
        gnome) dbus_args+=(gnome-session) ;;
        i3|i3wm) dbus_args+=(i3 --shmlog-size 0) ;;
        jwm) dbus_args+=(jwm) ;;
        kde) dbus_args+=(startplasma-x11) ;;
        lxde) dbus_args+=(startlxde) ;;
        lxqt) dbus_args+=(lxqt-session) ;;
        mate) dbus_args+=(mate-session) ;;
        xfce) dbus_args+=(xfce4-session) ;;
        openbox) dbus_args+=(openbox-session) ;;
        *) dbus_args+=($DEFAULT_SESSION) ;;
    esac

    echo "dbus-launch ${dbus_args[*]}"
}

exec $(get_session)