Hi. Under kernel 2.6.23, I could get sound from the alsa device
created by the module snd_bt87x (it gets sound from my TV card).
Under kernel 2.6.24, there is no sound:
jorge@jorge ~/tmp $ arecord -v -D hw:1,1 -d 10 -f S16_LE teste.wav
Recording WAVE 'teste.wav' : Signed 16 bit Little Endian, Rate 8000 Hz, Mono
Warning: rate is not accurate (requested = 8000Hz, got = 119466Hz)
please, try the plug plugin
Hardware PCM card 1 'Brooktree Bt878' device 1 subdevice 0
Its setup is:
stream : CAPTURE
access : RW_INTERLEAVED
format : S16_LE
subformat : STD
channels : 1
rate : 119466
exact rate : 119467 (1792000/15)
msbits : 16
buffer_size : 59334
period_size : 2046
period_time : 17126
tstamp_mode : NONE
period_step : 1
avail_min : 2046
start_threshold : 1
stop_threshold : 59334
silence_threshold: 0
silence_size : 0
boundary : 1944256512
jorge@jorge ~/tmp $ hexdump -d teste.wav
0000000 18770 17990 28964 00002 16727 17750 28006 08308
0000010 00016 00000 00001 00001 53930 00001 42324 00003
0000020 00002 00016 24932 24948 28928 00002 32767 32767
0000030 32767 32767 32767 32767 32767 32767 32767 32767
*
0027120 32767 32767 32767 32767 32767 32767
002712c
And yes, I have already tried changing mixer settings via alsamixer -c
1. Makes no difference.
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
alsa-devel with information about my board (it was responded by
Takashi).
For reference, this is the original email:
http://mailman.alsa-project.org/pipermail/alsa-devel/2007-August/002617.html
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).
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