sound with Bt878

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Hi all!

I'm with a stranger problem with my Bt878 card and the 2.4.5 kernel series and above (I didn't try with lower versions).
I _can_ listen to the sound when using the fbtv program, but under XFree86 (v4.1.0) I can't have the same success, either using the zapping or xawtv applications (xawtv even does not show any image). 
Can someone have any ideas about what can I do to solve this problem?

thanks a lot for your attention,

Lucas


Some useful information:
/sbin/modprobe videodev
/sbin/modprobe tuner type=2 debug=1
/sbin/modprobe msp3400 debug=2
/sbin/modprobe bttv card=10 tuner=2 radio=1 autoload=0

Linux video capture interface: v1.00
i2c-core.o: i2c core module
i2c-core.o: driver i2c TV tuner driver registered.
i2c-core.o: driver i2c msp3400 driver registered.
i2c-algo-bit.o: i2c bit algorithm module
bttv: driver version 0.7.72 loaded
bttv: using 2 buffers with 2080k (4160k total) for capture
bttv: BT848 and your chipset may not work together.            <-----
bttv: going to disable overlay.
bttv: Bt8xx card found (0).
bttv0: Bt878 (rev 2) at 00:0f.0, irq: 9, latency: 32, memory: 0xfd9fe000
bttv0: subsystem: 0070:13eb  =>  Hauppauge WinTV  =>  card=10
bttv0: model: BT878(Hauppauge new (bt878)) [insmod option]
bttv0: Hauppauge msp34xx: reset line init
tuner: chip found @ 0xc2
bttv0: i2c attach [Philips NTSC]
i2c-core.o: client [Philips NTSC] registered to adapter [bt848 #0](pos. 0).
msp34xx: init: chip=MSP3430G-A1, has NICAM support
msp3410: daemon started
msp3410: thread: sleep
bttv0: i2c attach [MSP3430G-A1]
i2c-core.o: client [MSP3430G-A1] registered to adapter [bt848 #0](pos. 1).
i2c-core.o: adapter bt848 #0 registered as adapter 0.
bttv0: Hauppauge eeprom: model=61381, tuner=Philips FM1236 (2), radio=yes
bttv0: i2c: checking for MSP34xx @ 0x80... found
bttv0: i2c: checking for TDA9875 @ 0xb0... not found
bttv0: i2c: checking for TDA7432 @ 0x8a... not found
msp34xx: AUDC_SET_INPUT(4)
msp3410: thread: wakeup
msp3410: setting mode: autodetect start (0x0001)
msp3410: current mode: ERROR (0x0000)                          <------
msp34xx: setbass: 32768 0x00
msp34xx: settreble: 32768 0x00
msp34xx: setvolume: mute=off 65535:65535  v=0x73 b=0x00
msp3410: thread: sleep


00:0f.0 Multimedia video controller: Brooktree Corporation Bt878 (rev 02)
	Subsystem: Hauppauge computer works Inc.: Unknown device 13eb
	Flags: bus master, medium devsel, latency 32, IRQ 9
	Memory at fd9fe000 (32-bit, prefetchable) [size=4K]

00:0f.1 Multimedia controller: Brooktree Corporation Bt878 (rev 02)
	Subsystem: Hauppauge computer works Inc.: Unknown device 13eb
	Flags: bus master, medium devsel, latency 32, IRQ 9
	Memory at fd9ff000 (32-bit, prefetchable) [size=4K]





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