Hi. Under kernel 2.6.23, I could get sound from the alsa device created by the module snd_bt87x. In kernel 2.6.24, there is no sound. Also, in kernel 2.6.23 the device would only appear if I modprobed the module with the option load_all=1. In kernel 2.6.24, the option load_all=1 is unnecessary for the device to appear. This is probably because I have in 2007 sent an email to this list with information about my board (it was responded by Takashi).
If you need any addition other than what I provide below, ask at any time.
jorge@jorge ~ $ uname -a Linux jorge 2.6.24-gentoo-r8d #4 Mon Jun 16 17:58:17 BRT 2008 i686 AMD Athlon(tm) XP 2600+ AuthenticAMD GNU/Linux
jorge@jorge ~ $ sudo lspci -v 00:00.0 Host bridge: VIA Technologies, Inc. VT8377 [KT400/KT600 AGP] Host Bridge Subsystem: VIA Technologies, Inc. Unknown device 0000 Flags: bus master, 66MHz, medium devsel, latency 8 Memory at e0000000 (32-bit, prefetchable) [size=128M] Capabilities: [a0] AGP version 2.0 Capabilities: [c0] Power Management version 2
00:01.0 PCI bridge: VIA Technologies, Inc. VT8235 PCI Bridge (prog-if 00 [Normal decode]) Flags: bus master, 66MHz, medium devsel, latency 0 Bus: primary=00, secondary=01, subordinate=01, sec-latency=0 Memory behind bridge: dde00000-dfefffff Prefetchable memory behind bridge: cdc00000-ddcfffff Capabilities: [80] Power Management version 2
00:07.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10) Subsystem: Realtek Semiconductor Co., Ltd. RT8139 Flags: bus master, medium devsel, latency 32, IRQ 10 I/O ports at ec00 [size=256] Memory at dfffff00 (32-bit, non-prefetchable) [size=256] Capabilities: [50] Power Management version 2 Kernel driver in use: 8139too
00:0b.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture (rev 11) Subsystem: PROLINK Microsystems Corp Unknown device 4011 Flags: bus master, medium devsel, latency 32, IRQ 5 Memory at dddfe000 (32-bit, prefetchable) [size=4K] Capabilities: [44] Vital Product Data <?> Capabilities: [4c] Power Management version 2 Kernel driver in use: bttv Kernel modules: bttv
00:0b.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev 11) Subsystem: PROLINK Microsystems Corp Unknown device 4011 Flags: bus master, medium devsel, latency 32, IRQ 5 Memory at dddff000 (32-bit, prefetchable) [size=4K] Capabilities: [44] Vital Product Data <?> Capabilities: [4c] Power Management version 2 Kernel driver in use: Bt87x Kernel modules: snd-bt87x
00:0c.0 Multimedia audio controller: C-Media Electronics Inc CM8738 (rev 10) Subsystem: Micro-Star International Co., Ltd. Unknown device 5900 Flags: bus master, medium devsel, latency 32, IRQ 11 I/O ports at e800 [size=256] Capabilities: [c0] Power Management version 2 Kernel driver in use: C-Media PCI Kernel modules: snd-cmipci
00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 80) (prog-if 00 [UHCI]) Subsystem: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller Flags: bus master, medium devsel, latency 32, IRQ 11 I/O ports at dc00 [size=32] Capabilities: [80] Power Management version 2 Kernel driver in use: uhci_hcd
00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 80) (prog-if 00 [UHCI]) Subsystem: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller Flags: bus master, medium devsel, latency 32, IRQ 11 I/O ports at e000 [size=32] Capabilities: [80] Power Management version 2 Kernel driver in use: uhci_hcd
00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller (rev 80) (prog-if 00 [UHCI]) Subsystem: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1 Controller Flags: bus master, medium devsel, latency 32, IRQ 5 I/O ports at e400 [size=32] Capabilities: [80] Power Management version 2 Kernel driver in use: uhci_hcd
00:10.3 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 82) (prog-if 20 [EHCI]) Subsystem: VIA Technologies, Inc. USB 2.0 Flags: bus master, medium devsel, latency 32, IRQ 10 Memory at dffffe00 (32-bit, non-prefetchable) [size=256] Capabilities: [80] Power Management version 2 Kernel driver in use: ehci_hcd
00:11.0 ISA bridge: VIA Technologies, Inc. VT8235 ISA Bridge Subsystem: VIA Technologies, Inc. Unknown device 0000 Flags: bus master, stepping, medium devsel, latency 0 Capabilities: [c0] Power Management version 2
00:11.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06) (prog-if 8a [Master SecP PriP]) Subsystem: VIA Technologies, Inc. VT82C586/B/VT82C686/A/B/VT8233/A/C/VT8235 PIPC Bus Master IDE Flags: bus master, medium devsel, latency 32, IRQ 255 [virtual] Memory at 000001f0 (32-bit, non-prefetchable) [size=8] [virtual] Memory at 000003f0 (type 3, non-prefetchable) [size=1] [virtual] Memory at 00000170 (32-bit, non-prefetchable) [size=8] [virtual] Memory at 00000370 (type 3, non-prefetchable) [size=1] I/O ports at fc00 [size=16] Capabilities: [c0] Power Management version 2
01:00.0 VGA compatible controller: nVidia Corporation NV17 [GeForce4 MX 440] (rev a3) (prog-if 00 [VGA controller]) Flags: bus master, 66MHz, medium devsel, latency 32, IRQ 11 Memory at de000000 (32-bit, non-prefetchable) [size=16M] Memory at d0000000 (32-bit, prefetchable) [size=128M] Memory at ddc80000 (32-bit, prefetchable) [size=512K] Expansion ROM at dfee0000 [disabled] [size=128K] Capabilities: [60] Power Management version 2 Capabilities: [44] AGP version 2.0
jorge@jorge ~ $ cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 6 model : 8 model name : AMD Athlon(tm) XP 2600+ stepping : 1 cpu MHz : 2133.528 cache size : 256 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse syscall mmxext 3dnowext 3dnow ts bogomips : 4271.41 clflush size : 32
jorge@jorge /proc/asound $ ls Bt878 card0 card1 cards CMI8738 devices hwdep oss pcm timers version jorge@jorge /proc/asound $ cat cards 0 [CMI8738 ]: CMI8738-MC6 - C-Media CMI8738 C-Media CMI8738 (model 55) at 0xe800, irq 11 1 [Bt878 ]: Bt87x - Brooktree Bt878 Brooktree Bt878 at 0xdddff000, irq 5 jorge@jorge /proc/asound $ cat devices 0: [ 0] : control 4: [ 0- 0]: hardware dependent 8: [ 0- 0]: raw midi 16: [ 0- 0]: digital audio playback 17: [ 0- 1]: digital audio playback 18: [ 0- 2]: digital audio playback 24: [ 0- 0]: digital audio capture 26: [ 0- 2]: digital audio capture 32: [ 1] : control 33: : timer 56: [ 1- 0]: digital audio capture 57: [ 1- 1]: digital audio capture jorge@jorge /proc/asound $ cat hwdep 00-00: OPL3 FM jorge@jorge /proc/asound $ cat pcm 00-02: CMI8738-MC6 : C-Media PCI IEC958 : playback 1 : capture 1 00-01: CMI8738-MC6 : C-Media PCI 2nd DAC : playback 1 00-00: CMI8738-MC6 : C-Media PCI DAC/ADC : playback 1 : capture 1 01-01: Bt87x Analog : Bt87x Analog : capture 1 01-00: Bt87x Digital : Bt87x Digital : capture 1 jorge@jorge /proc/asound $ cat version Advanced Linux Sound Architecture Driver Version 1.0.15 (Tue Nov 20 19:16:42 2007 UTC).