新安装UBUNTU碰到的几个问题，高手进来帮忙看一下！

[guiwei7255]

1、无线网卡不能使用
2、更新下载速度很慢，白天最高5 K左右，半夜可以达到60K，可我不可能等到半夜才更新，有什么更快的方法吗？
3、怎么打开3D桌面
4、电脑启动后，屏幕亮度自动调到最高，要自己手动调回来，我的是笔记本。
5、启动后，桌面上什么都没有，原来的图片背景都没有了，可一选更改桌面背景，但没有找到图片的时候就自己换回来了，真是神奇。

[booker]

2. 换一个更快的源，参见http://wiki.ubuntu.org.cn/Template:8.10source，还不行的话，换一个更快的网络环境。
3. 参见http://forum.ubuntu.org.cn/viewtopic.php?f=94&t=140531

[EE376]

我只知道第二问题怎么解决：需要更新一下源
（转）
在终端输入并运行

sudo cp /etc/apt/sources.list /etc/apt/sources.list.backup （备份当前的源列表，以便日後需要时恢复）

sudo gedit /etc/apt/sources.list （修改sources.list文件中源的列表）

然后在sources.list文件中尾部添加

#cn99.com 源更新服务器（江苏省常州市电信，推荐电信用户使用，我自己是南方电信1M带宽的用户，更新速度平均有100K）：

### Ubuntu.cn99.com 更新服务器（江苏省常州市电信，推荐电信用户使用。）

deb http://ubuntu.cn99.com/ubuntu/ hardy main restricted universe multiverse

deb http://ubuntu.cn99.com/ubuntu/ hardy-security main restricted universe multiverse

deb http://ubuntu.cn99.com/ubuntu/ hardy-updates main restricted universe multiverse

deb http://ubuntu.cn99.com/ubuntu/ hardy-proposed main restricted universe multiverse

deb http://ubuntu.cn99.com/ubuntu/ hardy-backports main restricted universe multiverse

deb-src http://ubuntu.cn99.com/ubuntu/ hardy main restricted universe multiverse

deb-src http://ubuntu.cn99.com/ubuntu/ hardy-security main restricted universe multiverse

deb-src http://ubuntu.cn99.com/ubuntu/ hardy-updates main restricted universe multiverse

deb-src http://ubuntu.cn99.com/ubuntu/ hardy-proposed main restricted universe multiverse

deb-src http://ubuntu.cn99.com/ubuntu/ hardy-backports main restricted universe multiverse

deb http://ubuntu.cn99.com/ubuntu-cn/ hardy main restricted universe multiverse





#Mirror.lupaworld.com 源更新服务器（浙江省杭州市双线服务器，网通同电信都可以用，亚洲地区官方更新服务器）：

deb http://mirror.lupaworld.com/ubuntu hardy main restricted universe multiverse

deb http://mirror.lupaworld.com/ubuntu hardy-security main restricted universe multiverse

deb http://mirror.lupaworld.com/ubuntu hardy-updates main restricted universe multiverse

deb http://mirror.lupaworld.com/ubuntu hardy-backports main restricted universe multiverse

deb-src http://mirror.lupaworld.com/ubuntu hardy main restricted universe multiverse

deb-src http://mirror.lupaworld.com/ubuntu hardy-security main restricted universe multiverse

deb-src http://mirror.lupaworld.com/ubuntu hardy-updates main restricted universe multiverse

deb-src http://mirror.lupaworld.com/ubuntu hardy-backports main restricted universe multiverse



Ubuntu 官方源 推荐北方网通用户添加

deb http://archive.ubuntu.com/ubuntu/ hardy main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ hardy-security main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ hardy-updates main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ hardy-proposed main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ hardy-backports main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ hardy main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ hardy-security main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ hardy-updates main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ hardy-proposed main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ hardy-backports main restricted universe multiverse



台湾的官方源速度也相当不错，有时甚至快于内地的：

deb http://tw.archive.ubuntu.com/ubuntu hardy main restricted universe multiverse

deb http://tw.archive.ubuntu.com/ubuntu hardy-security main restricted universe multiverse

deb http://tw.archive.ubuntu.com/ubuntu hardy-updates main restricted universe multiverse

deb http://tw.archive.ubuntu.com/ubuntu hardy-backports main restricted universe multiverse

deb http://tw.archive.ubuntu.com/ubuntu hardy-proposed main restricted universe multiverse

deb-src http://tw.archive.ubuntu.com/ubuntu hardy main restricted universe multiverse

deb-src http://tw.archive.ubuntu.com/ubuntu hardy-security main restricted universe multiverse

deb-src http://tw.archive.ubuntu.com/ubuntu hardy-updates main restricted universe multiverse

deb-src http://tw.archive.ubuntu.com/ubuntu hardy-backports main restricted universe multiverse

deb-src http://tw.archive.ubuntu.com/ubuntu hardy-proposed main restricted universe multiverse



小贴士：只需上述几个源当中保留一个你测试出来下载速度最快的源就可以了，不用把所有源添加，添加完国内源之后，当然最好还是在国内源后面再添加一个官方的源了：

deb http://archive.ubuntu.com/ubuntu/ hardy main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ hardy-security main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ hardy-updates main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ hardy-proposed main restricted universe multiverse

deb http://archive.ubuntu.com/ubuntu/ hardy-backports main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ hardy main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ hardy-security main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ hardy-updates main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ hardy-proposed main restricted universe multiverse

deb-src http://archive.ubuntu.com/ubuntu/ hardy-backports main restricted universe multiverse



然后 保存编辑好的文件，终端执行以下命令进行软件升级。

sudo apt-get update #这一步是更新你的源列表，换源後必须执行

[qiang65]

4.你可以在系统－首选项－电源管理里调
5.你的墙纸在你的win分区里，而unbutu每次启动都不会去直接挂你的win分区的，所以找不到你的图片。当你去找时就加载分区了所以它又回来了。