interfaces文件与图形界面的奇怪现象？

[vital]

我的/etc/network/interfaces文件内容原来是这样：

# Used by ifup(8) and ifdown(8). See the interfaces(5) manpage or
# /usr/share/doc/ifupdown/examples for more information.
auto dsl-provider
iface dsl-provider inet ppp
provider dsl-provider

# added by pppoeconf
auto eth0
iface eth0 inet static

pre-up /sbin/ifconfig eth0 up # line maintained by pppoeconf
address 192.168.1.1
netmask 255.255.255.0

iface lo inet loopback

登录之后，还要sudo pon dsl-provider一下，才能上网adsl

为了能开机自动上网，我凭感觉改了一下该文件的内容，就是调换了一下顺序

# Used by ifup(8) and ifdown(8). See the interfaces(5) manpage or
# /usr/share/doc/ifupdown/examples for more information.


# added by pppoeconf
auto eth0
iface eth0 inet static

pre-up /sbin/ifconfig eth0 up # line maintained by pppoeconf
address 192.168.1.1
netmask 255.255.255.0

auto dsl-provider
iface dsl-provider inet ppp
provider dsl-provider


iface lo inet loopback

结果登录桌面时，输入密码回车后，出来一个输入法状态条，但是桌面不能显示，我ctrl＋alt＋f2切换到tty1，ping了一下，发现网络已自动联上了，
究竟为什么不能登录桌面？
怎么样才能开机自动上adsl？
请教各位！

[vital]

补充一下，可以进入桌面，但是要等上10分钟左右吧
感觉好象自动上网的话，就很难进入桌面
怎么回事？

[gnix_oag]

这是我的，你看看
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# This is a list of hotpluggable network interfaces.
# They will be activated automatically by the hotplug subsystem.
mapping hotplug
script grep
map eth0

auto dsl-provider
iface dsl-provider inet ppp
provider dsl-provider

# added by pppoeconf
auto eth0
iface eth0 inet static

pre-up /sbin/ifconfig eth0 up # line maintained by pppoeconf
address 192.168.1.8
netmask 255.255.255.0

[Element]

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# This is a list of hotpluggable network interfaces.
# They will be activated automatically by the hotplug subsystem.
mapping hotplug
script grep
map eth0

# The primary network interface
iface eth0 inet dhcp

auto eth0

iface dsl-provider inet ppp
provider dsl-provider

这是我的，给LZ多一个参考。