声卡Creative PCI64V 芯片EV1938的问题!

ly2101

如题,内核2.6.21.5安装的是OSS4.0驱动.
驱动已经装好!
当播放音乐的时候,PCM没有电平显示.
PCM2(下面的第一个格)却有电平显示!
还有后面的vmix0-out也有电平!

但是喇叭没有声音!
硬件是NEC VA50J的本!

这是ossinfo的信息:
Version info: OSS 4.0 (b071214/200712150744) (0x00040003) GPL
Platform: Linux/i686 2.6.21.5 #1 Sat Jun 23 21:16:21 PUP 2007 (ly2101_PC)

Number of audio devices:        2
Number of audio engines:        10
Number of mixer devices:        1


Device objects
0: osscore0 OSS core services
1: apci970 Ectiva AudioPCI interrupts=240486 (240486)
2: ossusb0 USB audio core services
3: vmix0 OSS transparent virtual support


Mixer devices (/dev/mixer*)
0: AC97 Mixer (EV1938) (Mixer 0 of device object 1)

Audio devices
/dev/oss/apci970/pcm0   Ectiva AudioPCI (rev 0)  (device index 0)
/dev/oss/apci970/pcm1   Ectiva AudioPCI (playback only)  (device index 1)


没有声音很着急!请教如何解决???