From: Hans-Frieder Vogt <hfvogt@gmx.net>
To: alsa-devel@alsa-project.org
Subject: snd-hda-intel[ALC883] scratching and stuttering sound on MCP78S board
Date: Sun, 22 Jun 2008 11:42:52 +0200 [thread overview]
Message-ID: <200806221142.52334.hfvogt@gmx.net> (raw)
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I am experiencing severely scratching and stuttering sound on my nVidia MCP78S (GeForce 8200) based Asus M3N78-EMH HDMI mainboard, which has an ALC883 on board, running with an Athlon X2 4850e dual-core CPU.
It sounds, as if the sound buffers are not filled in time and are therefore repeated many times. The problem seems to be kernel / alsa-driver related, because I experience the problem also when running runlevel 1 with only a minimum processes.
Strange enough, the sound is OK when I do a larger compilation in parallel (kernel make with make -j 2), but the sound is not OK when I run burnK7 (two instances to load both CPU cores) => What is different in CPU loading or scheduling between these two load cases?
I tried several things so far:
Debian kernel image 2.6.25-2-amd64 (2.6.25-5)
self-compiled 2.6.25.x (with x in nothing to 5), with and without -rt patches
self-compiled 2.6.26-rc5, -rc6, -rc7
latest alsa-driver 1.0.17rc2
please find the alsa-info output here:
http://pastebin.ca/1052359
attached is my latest kernel setup (2.6.26-rc7, alsa driver modules now replaced by 1.0.17-rc2).
Please tell me your suggestions what the problem may be or how I could debug the problem.
Thanks.
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Hans-Frieder Vogt e-mail: hfvogt <at> gmx .dot. net
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