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Old 07-14-07, 02:08 PM   #1
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Join Date: Jul 2007
Posts: 3
Default Getting audio working with MCP61 / nForce 430


I cannot get my sound working in Gentoo linux (~amd64). I've noticed a relevant thread here but the advices given there (use HDA_INTEL driver) were not successful.

System details:
System is a new HP Pavillion a6010 (Specs) , running Gentoo, with ck-sources kernel v2.6.21-ck2-r1.
According to official docs (see link above) chipset is ALC 888.
lspci shows: 00:05.0 Audio device: nVidia Corporation MCP61 High Definition Audio (rev a2)
lspci -n shows: 00:05.0 0403: 10de:03f0 (rev a2)
(if needed, I can post here lspci -v output as well)

boot time kernel message:
Advanced Linux Sound Architecture Driver Version 1.0.14rc3 (Wed Mar 14 07:25:50 2007 UTC).
ACPI: PCI Interrupt Link [AAZA] enabled at IRQ 22
ACPI: PCI Interrupt 0000:00:05.0[b] -> Link [AAZA] -> GSI 22 (level, low) -> IRQ 22
PCI: Setting latency timer of device 0000:00:05.0 to 64
hda_codec: Unknown model for ALC883, trying auto-probe from BIOS...
ALSA device list:
#0: HDA NVidia at 0xfe024000 irq 22

When trying to "play /usr/qt/3/examples/sound/sounds/1.wav" I get:
ALSA lib dlmisc.c:118snd_dlsym_verify) unable to verify version for symbol _snd_pcm_empty_open
ALSA lib pcm.c:2108snd_pcm_open_conf) symbol _snd_pcm_empty_open is not defined inside (null)
play stio: Failed writing default: cannot open audio device
artsd gives its own error (I'm using KDE).

How can I get sound working?

Many thanks!
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Old 07-17-07, 03:21 PM   #2
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Unhappy Re: Getting audio working with MCP61 / nForce 430

Any news on this guys? Nvidia people? anyone?...
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Old 07-22-07, 02:50 PM   #3
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Default SOLVED: Getting audio working with MCP61 / nForce 430

For whoever visits this with a similar issue.
The problem was not in the driver for the card but rather in the alsa-lib library. Kernel identified the card. As a ~amd64 Gentoo user it installed for me the latest alsa lib. Well, apparently this library is going to change (something around "ABIs", for whatever it means) and this change broke other applications. All I needed is to echo '>=media-libs/alsa-lib-1.0.14_rc1-r1' >> /etc/portage/package.mask, to force recompile my alsa lib to an older version, and re-emerge. Note that you might need to revdep-rebuild afterwards (AFAIK, you need it). There's some thread about this in Gentoo forums (sorry, don't have the link currently).
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