已经卸载了openbox，lxde，安装了xfce，启动一样是lxde，怎么弄？
root@firefly:~# update-alternatives --display x-window-manager
x-window-manager - manual mode
link currently points to /usr/bin/xfwm4
/usr/bin/xfwm4 - priority 60
slave x-window-manager.1.gz: /usr/share/man/man1/xfwm4.1.gz
Current ‘best’ version is ‘/usr/bin/xfwm4’.
root@firefly:~# update-alternatives --config x-window-manager
There is 1 choice for the alternative x-window-manager (providing /usr/bin/x-window-manager).
Selection Path Priority Status
0 /usr/bin/xfwm4 60 auto mode
- 1 /usr/bin/xfwm4 60 manual mode