From: bugtrack@alsa-project.org
To: alsa-devel@alsa-project.org
Subject: [ALSA - driver 0001658]: Capture happens only on one channel
Date: Sat, 7 Jan 2006 06:24:59 +0100 [thread overview]
Message-ID: <e2ec281e97a9ad4979983772b85c0f6f@bugtrack.alsa-project.org> (raw)
A NOTE has been added to this issue.
======================================================================
<https://bugtrack.alsa-project.org/alsa-bug/view.php?id=1658>
======================================================================
Reported By: phil_troin
Assigned To:
======================================================================
Project: ALSA - driver
Issue ID: 1658
Category: PCI - intel8x0
Reproducibility: always
Severity: minor
Priority: normal
Status: new
Distribution: Gentoo
Kernel Version: 2.6.14-gentoo-r2
======================================================================
Date Submitted: 12-18-2005 08:40 CET
Last Modified: 01-07-2006 06:24 CET
======================================================================
Summary: Capture happens only on one channel
Description:
When I am playing a CD, if I capture the sound output via the capture
channel OR the CD channel (amixer output attached), the captured sound is
only one one channel (the right one) and is very distorted.
The audio plays normally in stereo on the speakers.
======================================================================
----------------------------------------------------------------------
linuxbear - 12-18-05 12:02
----------------------------------------------------------------------
I have the same issue. My kernel is 2.6.14 with Con Kolivas ck5 patch.
nForce motherboard with intel8x0.... does not work, capture happens on one
channel... tried every mixer setting.
00:06.0 Multimedia audio controller: nVidia Corporation nForce2 AC97 Audio
Controler (MCP) (rev a1)
Subsystem: Biostar Microtech Int'l Corp: Unknown device 8201
Flags: bus master, 66Mhz, fast devsel, latency 0, IRQ 5
I/O ports at d400 [size=256]
I/O ports at d800 [size=128]
Memory at e0001000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [44] Power Management version 2
----------------------------------------------------------------------
tgutwin - 01-07-06 06:24
----------------------------------------------------------------------
Same issue here, plus a few others on the MythTV user list have the same
symptoms after kernel and/or ALSA dirver updates.
Playback works fine
Capture only gets one channel (Left).
I can monitor the 2ch audio fine but when it gets recorded through Myth
(or LiveTV which is also a capture and record process) it loses its right
channel of audio with plain old analog 2 channel output.
NO digital AC3 used here (yet)
I have gone through the alsa setup with a fine tooth comb. it looks
correct.
plus all audio and video apps outside of MythTV play back work correctly.
I have tried every mute/capture setting using a couple of different
mixers.
The problem persists.
My system is a freshly built system specifically to be a home for
>> AMD X2
>> Asus A8N-e with onboard nvidia CK804/intel8x0
>> Fedora core 4 built for x86_64
>> with smp kernel 2.6.14-1.1653_FC4
>> Alsa Version 1.0.10rc3 for kernel 2.6.14-1.1653_FC4smp (SMP)
From atrpms
[root@dvr dev]# cd /proc
[root@dvr proc]# cd asound
[root@dvr asound]# ls
card0 cards CK804 devices hwdep modules oss pcm seq timers
version
[root@dvr asound]# cat version
Advanced Linux Sound Architecture Driver Version 1.0.10rc3.
Compiled on Dec 14 2005 for kernel 2.6.14-1.1653_FC4smp (SMP).
[root@dvr asound]# cat cards
0 [CK804 ]: NFORCE - NVidia CK804
NVidia CK804 with ALC850 at 0xc8103000, irq 50
lsmod | grep snd
snd_usb_audio 92160 0
snd_usb_lib 21504 1 snd_usb_audio
snd_rawmidi 32544 1 snd_usb_lib
snd_hwdep 14624 1 snd_usb_audio
snd_intel8x0 39848 1
snd_ac97_codec 115516 1 snd_intel8x0
snd_ac97_bus 6784 1 snd_ac97_codec
snd_seq_dummy 8068 0
snd_seq_oss 42596 0
snd_seq_midi_event 12672 1 snd_seq_oss
snd_seq 67288 5
snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_seq_device 14224 4
snd_rawmidi,snd_seq_dummy,snd_seq_oss,snd_seq
snd_pcm_oss 61984 0
snd_mixer_oss 22656 2 snd_pcm_oss
snd_pcm 106888 4
snd_usb_audio,snd_intel8x0,snd_ac97_codec,snd_pcm_oss
snd_timer 30344 2 snd_seq,snd_pcm
snd 69088 15
snd_usb_audio,snd_usb_lib,snd_rawmidi,snd_hwdep,snd_intel8x0,snd_ac97_codec,snd_seq_dummy,snd_seq_oss,snd_seq,snd_seq_device,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_timer
soundcore 16353 2 snd
snd_page_alloc 15376 2 snd_intel8x0,snd_pcm
There are other users that have reported the same issue.
What other debugging can I do?
I can send in amixer scontents, but I have enumerated all options.
Issue History
Date Modified Username Field Change
======================================================================
12-18-05 08:40 phil_troin New Issue
12-18-05 08:40 phil_troin File Added: amixout
12-18-05 08:40 phil_troin Distribution => Gentoo
12-18-05 08:40 phil_troin Kernel Version => 2.6.14-gentoo-r2
12-18-05 12:00 linuxbear Note Added: 0007071
12-18-05 12:02 linuxbear Note Edited: 0007071
12-27-05 10:34 linuxbear Issue Monitored: linuxbear
01-07-06 06:24 tgutwin Note Added: 0007508
======================================================================
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next reply other threads:[~2006-01-07 5:25 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-07 5:24 bugtrack [this message]
-- strict thread matches above, loose matches on Subject: below --
2006-03-13 14:50 [ALSA - driver 0001658]: Capture happens only on one channel bugtrack
2006-03-10 18:15 bugtrack
2006-01-26 19:45 bugtrack
2006-01-18 17:16 bugtrack
2006-01-18 10:53 bugtrack
2006-01-13 17:17 bugtrack
2006-01-13 16:51 bugtrack
2006-01-13 16:46 bugtrack
2006-01-13 16:12 bugtrack
2006-01-13 13:29 bugtrack
2006-01-13 1:17 bugtrack
2006-01-09 0:43 bugtrack
2006-01-09 0:34 bugtrack
2005-12-18 11:00 bugtrack
2005-12-18 7:40 bugtrack
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