修改配置文件 ~/.vnc/xstartup

#!/bin/sh

xrdb "$HOME/.Xresources"
xsetroot -solid grey
#x-terminal-emulator -geometry 80x24+10+10 -ls -title "$VNCDESKTOP Desktop" &
#x-window-manager &
# Fix to make GNOME work
export XKL_XMODMAP_DISABLE=1
/etc/X11/Xsession

# 此行以上内容为原始内容，以下为新增内容
unset SESSION_MANAGER
unset DBUS_SESSION_BUS_ADDRESS
x-session-manager & xfdesktop & xfce4-panel &
xfce4-menu-plugin &
xfsettingsd &
xfconfd &
xfwm4 &