My Pinnacle PCTV card using xawtv works fine in my two pc's with a SiS650 and a SiS745 chipset. But when i put the card in my third pc with a SiS646(645dx) chipset the video works but sound fails because bttv doesn't find MSP3400: bttv: driver version 0.7.91 loaded bttv: using 2 buffers with 2080k (4160k total) for capture bttv: Host bridge is PCI device 1039:0646 (Silicon Integrated Systems [SiS]) <------- bttv: Bt8xx card found (0). bttv0: Bt878 (rev 17) at 00:0c.0, irq: 11, latency: 32, memory: 0xfc000000 bttv0: detected: Pinnacle PCTV [card=39], PCI subsystem ID is 11bd:0012 bttv0: using: BT878(Pinnacle PCTV Studio Pr) [card=52,insmod option] bttv0: i2c: checking for MSP34xx @ 0x80... not found bttv0: miro: id=18 tuner=2 radio=fmtuner stereo=no bttv0: i2c: checking for MSP34xx @ 0x80... not found <------------------------------ bttv0: i2c: checking for TDA9875 @ 0xb0... not found bttv0: i2c: checking for TDA7432 @ 0x8a... not found bttv0: i2c attach [client=Philips NTSC,ok] bttv0: registered device video0 bttv0: registered device vbi0 bttv0: registered device radio0 I am using the same kernel on all three pc's and even tried 2.4.19-rc1-ac1 but still get the same MSP34XX not found. I can modprobe msp3400 ok, but that doesn't help. On the two pc's where sound works i get MSP34xx found and registered and msp3410 daemon started: Jul 13 20:03:09 gent kernel: bttv0: i2c: checking for MSP34xx @ 0x80... found Jul 13 20:03:09 gent kernel: i2c-core.o: driver i2c msp3400 driver registered. Jul 13 20:03:09 gent kernel: msp34xx: init: chip=MSP3451G-A2, has NICAM support Jul 13 20:03:09 gent kernel: msp3410: daemon started Jul 13 20:03:09 gent kernel: bttv0: i2c attach [client=MSP3451G-A2,ok] Jul 13 20:03:09 gent kernel: i2c-core.o: client [MSP3451G-A2] registered to Any clues to this problem greatly appreciated.