笔记本双声卡USB＋自带SIS声卡 切换的问题？

如题，两个声卡怎么才可以任意切换，笔记本声卡有点坏了，一直用USB声卡，但是在Mandriva里怎么自由切换声卡设备，在 UBUNTU 里切换太简单了，

请各位大哥或者高手路过时帮忙回答一下，就差这个东西就可以砍掉WINDOWS了，网银，网络电话都搞定了，其他游戏再慢慢的搞，清大家支持一下

网银，怎么搞定的？
另外我的也是笔记本双声卡。一个ac97，一个usb声卡pcm2702芯片。在mac os 下是可以自动切换的。我一拔掉usb声卡就自动用ac97，一插上就用usb的声卡。另外好像linux下好每个程序单独设置。比较麻烦的。缺乏一致性才是linux的弱点。

这边好像有解决方案：
http://forums.gentoo.org/viewtopic-t-375470.html
I bought a pair of usb speakers and wanted alsa to automatically switch to the usb-audio card when the device is plugged into the usb port. First, make sure you have usb-audio configured. Plugin the speakers and cat /proc/asound/cards. You should see your usb-audio device. Then put the following 代码:

#!/bin/sh
CARDNUM=`sed -n 's/\(^[0-9]\).*/\1/p' < /proc/asound/cards | tail -n 1`
cat<<EOF > /etc/asound.conf
pcm.!default {
type hw
card $CARDNUM
}
ctl.!default {
type hw
card $CARDNUM
}
EOF


in /etc/dev.d/sound/alsa-default.dev (name is unimportant, but must end in .dev). Make it executable. Whenever there is a sound hotplug event, the default alsa card will be the last one listed in /proc/asound/cards. This also works when the speakers are unplugged (returns to card 0).
不知道可行否