ALSA, via 82xx, ALC650, and multichannel output.
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I attempted posting this to the alsa mailing lists, but I'm not subscribed, and I think it's waiting for moderator approval. In any case, ALSA being part of the kernel, here's my bug report:
This is using the driver from alsa-project on a 2.4 kernel (details below):
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I'd like to confirm a bug report (follows) on my system:
The System:
Gigabyte GVAXP-Ultra with onboard RealTek ALC650 soundcard. Altec Lansing 251 5.1 surround speaker system (analog)
Kernel: 2.4.21-pre5-ac3
Alsa: 0.9.2
lsmod:
[root@cobra phantom]# lsmod
Module Size Used by Tainted: P
nvidia 1592672 10 (autoclean)
snd-pcm-oss 54500 1
snd-mixer-oss 18456 0 [snd-pcm-oss]
snd-via82xx 17996 1
snd-pcm 93920 0 [snd-pcm-oss snd-via82xx]
snd-timer 22600 0 [snd-pcm]
snd-ac97-codec 46624 0 [snd-via82xx]
snd-mpu401-uart 5856 0 [snd-via82xx]
snd-rawmidi 20960 0 [snd-mpu401-uart]
snd-seq-device 6796 0 [snd-rawmidi]
snd 53380 0 [snd-pcm-oss snd-mixer-oss
snd-via82xx
snd-pcm snd-timer snd-ac97-codec snd-mpu401-uart snd-rawmidi snd-seq-device]
snd-page-alloc 8984 0 [snd-via82xx snd-pcm]
The Problem:
My speakers have a switch between 2/4 channels and 6 channels. When in 6-channel mode, nothing will play on the center and rear
speakers, unless I enable Duplicate Front. When in 4 channel mode, all speakers play. Apparently, multichannel output isn't working.
Note: I have unmuted almost everything, including
CENTER, SURROUND, LFE....
Additional info:
I think I compiled with debug on, but I'm not sure anymore. I get these messages:
ALSA ../alsa-kernel/pci/via82xx.c:675: invalid via82xx_cur_ptr, using last valid pointer
ALSA ../alsa-kernel/pci/via82xx.c:675: invalid via82xx_cur_ptr, using last valid pointer
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Original report:
Quoted 6 lines
# From: Armando
# Subject: [Alsa-user] Multichannel in Realtek ACL650 (via_82xx) # Date: Tue, 25 Mar 2003 07:44:17 -0800
Hi:
I downloaded ALSA drivers v0.9.0rc6 and I'm using them now. They
work
Quoted 7 lines
correctly, but this Sound card (I have a Gigabyte GA7-VAX mobo) is multichannel (up to 6.1) in Windows.
I'm currently using 2.1 speakers configuration, but I have 4.1
speakers, can I enable 4.1 output? Is it possible with current drivers? How?
Quoted 6 lines
P.D.: This soundcard uses the line-in connector for rear speakers. (in 4.1 mode).
Thanks for your help.
-=ArCePi=-
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