First, the question. Is the design of the bttv driver supposed to allow opening the video and radio devices at the same time? If I start a radio app, a video app will refuse to start. But it looks like the devices generate EBUSY independently, so I'm not sure why the 2nd app fails. Are the apps coded wrong? What is the correct behavior? Second, the problems. While running tv and radio apps, the radio device eventually became perpetually busy. Nothing seems to be using it, but it always returns busy on open: [root@porky kernel]# fuser /dev/radio0 [root@porky kernel]# cat /dev/radio0 cat: /dev/radio0: Device or resource busy I can't unload the module, either. Also, (when the module *is* working) the volume ioctl never works. I get audio ok, but no volume control. The system is a Hauppauge WinTV with the 878 chip, SMP mainboard, kernel 2.4.9. Here's a log of the bttv stuff: Oct 29 09:20:24 porky kernel: Linux video capture interface: v1.00 Oct 29 09:20:24 porky kernel: i2c-core.o: i2c core module Oct 29 09:20:24 porky kernel: i2c-algo-bit.o: i2c bit algorithm module Oct 29 09:20:24 porky kernel: bttv: driver version 0.7.72 loaded Oct 29 09:20:24 porky kernel: bttv: using 2 buffers with 2080k (4160k total) for capture Oct 29 09:20:24 porky kernel: bttv: Host bridge needs ETBF enabled. Oct 29 09:20:24 porky kernel: bttv: Bt8xx card found (0). Oct 29 09:20:24 porky kernel: bttv0: Bt878 (rev 2) at 00:0a.0, irq: 9, latency: 32, memory: 0xe1000000 Oct 29 09:20:24 porky kernel: bttv0: subsystem: 0070:13eb => Hauppauge WinTV => card=10 Oct 29 09:20:24 porky kernel: bttv0: model: BT878(Hauppauge new (bt878)) [autodetected] Oct 29 09:20:24 porky kernel: bttv0: enabling ETBF (430FX/VP3 compatibilty) Oct 29 09:20:24 porky kernel: bttv0: Hauppauge msp34xx: reset line init Oct 29 09:20:24 porky kernel: i2c-core.o: adapter bt848 #0 registered as adapter 0. Oct 29 09:20:24 porky kernel: bttv0: Hauppauge eeprom: model=62471, tuner=Philips FM1236 (2), radio=yes Oct 29 09:20:24 porky kernel: bttv0: i2c: checking for MSP34xx @ 0x80... not found Oct 29 09:20:24 porky kernel: bttv0: i2c: checking for TDA9875 @ 0xb0... not found Oct 29 09:20:24 porky kernel: bttv0: i2c: checking for TDA7432 @ 0x8a... not found Oct 29 09:20:24 porky kernel: tvaudio: TV audio decoder + audio/video mux driverOct 29 09:20:24 porky kernel: tvaudio: known chips: tda9840,tda9873h,tda9850,tda9855,tea6300,tea6420,tda8425,pic16c54 (PV951) Oct 29 09:20:24 porky kernel: i2c-core.o: driver generic i2c audio driver registered. Oct 29 09:20:24 porky kernel: bttv0: i2c attach [tda9850] Oct 29 09:20:24 porky kernel: i2c-core.o: client [tda9850] registered to adapter [bt848 #0](pos. 0). Oct 29 09:20:24 porky kernel: i2c-core.o: driver i2c TV tuner driver registered.Oct 29 09:20:24 porky kernel: tuner: chip found @ 0xc2 Oct 29 09:20:24 porky kernel: bttv0: i2c attach [Philips NTSC] Oct 29 09:20:24 porky kernel: i2c-core.o: client [Philips NTSC] registered to adapter [bt848 #0](pos. 1). Oct 29 09:20:24 porky kernel: bttv0: PLL: 28636363 => 35468950 ... ok Oct 29 09:20:24 porky modprobe: modprobe: Can't locate module char-major-81-1 Here are the loaded modules: Module Size Used by sr_mod 15360 0 (autoclean) tuner 4976 1 (autoclean) tvaudio 8896 1 (autoclean) bttv 58064 1 (autoclean) i2c-algo-bit 7360 1 (autoclean) [bttv] i2c-core 13760 0 (autoclean) [tuner tvaudio bttv i2c-algo-bit] videodev 5824 4 (autoclean) [bttv] mga 100912 1 agpgart 28672 3 evdev 4736 1 autofs 12128 1 (autoclean) eepro100 17984 1 (autoclean) ipchains 41856 0 printer 6464 0 (unused) usbkbd 3472 0 (unused) wacom 4656 0 (unused) ide-scsi 8480 0 scsi_mod 100928 2 [sr_mod ide-scsi] ide-cd 27168 0 cdrom 28736 0 [sr_mod ide-cd] gus 50400 1 ad1848 19440 0 [gus] sound 62272 1 [gus ad1848] soundcore 4816 7 [sound] mousedev 4608 0 (unused) keybdev 2208 0 (unused) hid 19376 0 (unused) input 4160 0 [evdev usbkbd wacom mousedev keybdev hid] usb-uhci 23072 0 (unused) usbcore 54464 1 [printer usbkbd wacom hid usb-uhci] b.c.
