[Alsa-user] via82xx only records silence

[James Sleeman]

Hi all, I have a problem with the via82xx driver that I'm hoping someone else has encountered and solved - while it plays fine, it only records silence.

I can do

$ aplay some.wav

without a problem, sounds great. I have my tv card connected up to line in, have the channels unmuted, and input level set to max, I can hear the input fine on the line out (and volume is normal, and controllable by master volume or input level independantly), and when I do

$ arecord someother.wav

it all *appears* to work fine. I stop the recording and play it back, but only silence has been recorded (i.e no sound at all). I am stumped as to why this isn't working.

Here is the output from various stuff that might be of help.

$ cat version
Advanced Linux Sound Architecture Driver Version 0.9.0rc5.
Compiled on Nov 1 2002 for kernel 2.4.18 with versioned symbols.

$ cat cards
0 [card0 ]: VIA686A - VIA 82C686A/B
VIA 82C686A/B at 0xdc00, irq 10
$ cat devices
0: [0- 0]: ctl
16: [0- 0]: digital audio playback
24: [0- 0]: digital audio capture
33: : timer

$ cat pcm
00-00: VIA 82C686A/B : VIA 82C686A/B : playback 1 : capture 1

$ cat timers
G0: system timer : 10000.000us (10000000 ticks)
P0-0-0: PCM playback 0-0-0 : SLAVE
P0-0-1: PCM capture 0-0-1 : SLAVE

$ uname -a
Linux mortimer 2.4.18 #1 Sat Sep 28 17:56:46 NZST 2002 i686 AMD Duron(tm) AuthenticAMD GNU/Linux

$ cat /proc/pci
PCI devices found:
Bus 0, device 0, function 0:
Host bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133] (rev 3).
Master Capable. Latency=8.
Prefetchable 32 bit memory at 0xe0000000 [0xe3ffffff].
Bus 0, device 1, function 0:
PCI bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133 AGP] (rev 0).
Master Capable. No bursts. Min Gnt=8.
Bus 0, device 7, function 0:
ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South] (rev 64).
Bus 0, device 7, function 1:
IDE interface: VIA Technologies, Inc. Bus Master IDE (rev 6).
Master Capable. Latency=32.
I/O at 0xffa0 [0xffaf].
Bus 0, device 7, function 3:
USB Controller: VIA Technologies, Inc. UHCI USB (#2) (rev 26).
IRQ 9.
Master Capable. Latency=64.
I/O at 0xd000 [0xd01f].
Bus 0, device 7, function 2:
USB Controller: VIA Technologies, Inc. UHCI USB (rev 26).
IRQ 9.
Master Capable. Latency=64.
I/O at 0xcc00 [0xcc1f].
Bus 0, device 7, function 4:
SMBus: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev 64).
Bus 0, device 7, function 5:
Multimedia audio controller: VIA Technologies, Inc. AC97 Audio Controller (rev 80).
IRQ 10.
I/O at 0xdc00 [0xdcff].
I/O at 0xd800 [0xd803].
I/O at 0xd400 [0xd403].
Bus 0, device 10, function 0:
Multimedia video controller: Brooktree Corporation Bt878 (rev 2).
IRQ 10.
Master Capable. Latency=64. Min Gnt=16.Max Lat=40.
Prefetchable 32 bit memory at 0xdddfe000 [0xdddfefff].
Bus 0, device 10, function 1:
Multimedia controller: Brooktree Corporation Bt878 (rev 2).
IRQ 10.
Master Capable. Latency=64. Min Gnt=4.Max Lat=255.
Prefetchable 32 bit memory at 0xdddff000 [0xdddfffff].
Bus 0, device 13, function 0:
Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8029(AS) (rev 0).
IRQ 5.
I/O at 0xc800 [0xc81f].
Bus 1, device 0, function 0:
VGA compatible controller: nVidia Corporation NV11 (GeForce2 MX) (rev 161).
IRQ 11.
Master Capable. Latency=248. Min Gnt=5.Max Lat=1.
Non-prefetchable 32 bit memory at 0xde000000 [0xdeffffff].
Prefetchable 32 bit memory at 0xd0000000 [0xd7ffffff].

---
James Sleeman



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