[问题]我装的xubuntu面板上有声音控制图标为什么不出声呢

[shiningboy]

我的机器是tp x31，声卡是普通的ac97，装ubuntu的时候都没有任何问题，这次装个xubuntu就没声音了

用lspci -v显示的信息如下
00:1f.5 Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 01)
Subsystem: IBM Unknown device 0534
Flags: bus master, medium devsel, latency 0, IRQ 11
I/O ports at 1c00
I/O ports at 18c0
Memory at c0000c00 (32-bit, non-prefetchable)
Memory at c0000800 (32-bit, non-prefetchable)
Capabilities: <access denied>

输入aplay -l
aplay: device_list:205: 找不到声卡…

各位高手帮我分析一下，谢谢