[alsa-devel] Trying to support hda-intel ALC883_CLEVO
Pablo N. Hess
pablonhess at gmail.com
Thu Apr 19 06:15:06 CEST 2007
I have a Clevo M600 notebook, which comes with Realtek's HDA Intel audio
chip. 'lspci -vn' says:
00:1b.0 0403: 8086:27d8 (rev 02)
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at 6c340000 (64-bit, non-prefetchable) [size=16K]
Capabilities:  Power Management version 2
Capabilities:  Message Signalled Interrupts: 64bit+
Capabilities:  Express Unknown type IRQ 0
Capabilities:  Virtual Channel
Capabilities:  Unknown (5)
Linux 2.6.20 (Gentoo's gentoo-sources-2.6.20r4) recognizes it as an
ALC883 chip, but no parameter combination would make the sound work
properly (and that includes 'model=clevo'). As this module ships, no
output would come from the built-in speakers, and the headphone volume
was miserably low.
patch_realtek.c supports vendor=1558 device=0660, but only as a ALC880
chip. However, mine *is* an ALC883 vendor=1558 device=0660.
After copying the ALC880_CLEVO support code lines into a new
ALC883_CLEVO (and changing every occurence of ALC880 to ALC883 in that
new code block), recompiling the kernel and loading the snd-hda-intel
with model=clevo, almost everything started working fine. I mean, sound
comes as perfectly as it can through the built-in speakers, and the
built-in mic also outputs its sound through these speakers.
However, I can't capture anything. Alsamixer shows no capture device at
all (although all playback devices appear to be present).
This is very strange to me, as the built-in mic really *does* output its
sound through the speakers.
As you can probably see, I don't know anything about sound chips. I just
did what seemed understandable (to me) to add proper support for my
Thank you very much if you can help me solve this issue, as I really
need to speak with my family and girlfriend far, far away.
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