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Old 12-23-05, 06:01 PM   #1
tomaszg
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Default ALSA NF4 5.1 missing and swapped channels

Hi, I was searching forum for a while but I have not found anyone having the same problem.

I am using Asus K8N4-E with nForce 4-4X chipset and audio chip ALC850. Kernel 2.6.12 and newest alsa drivers/lib/utils (problem both with 1.0.10 or 1.0.11rc1) - intel8x0. I have the same problem with Gentoo 64-bit and 32-bit RH9 (highly upgraded though).

Speaker-test works fine for 2 and 4 channels, but with 5.1 I get no sound from center channel and rear-left is playing from central speaker (Jacks are connected ok, since with windows it works fine). The same situation can be seen in both mplayer and xine (with 6 channel option).

I have unmuted everything and set 6-channels in alsamixer. Kernel is not generating any messages.

I do not know the situation with newer kernels since they fail to detect (or rather assign IRQs) for PCI - kernel reports bios bug.

Edit:
lspci entry:
00:04.0 Multimedia audio controller: nVidia Corporation CK804 AC'97 Audio Controller (rev a2)
alsamixer output:
Card: NVidia CK804 Chip: Realtek ALC850 rev 0
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