[amd64] Sound breakage with snd_ich driver

Don Lewis truckman at FreeBSD.org
Tue Jul 20 01:24:02 PDT 2004

On 19 Jul, Conrad J. Sabatier wrote:
> This problem has persisted for the last several weeks now, close to a
> month or so, I would say.
> Playing MP3s using madplay, everything works fine for a while, then
> suddenly I get an "output: write: Invalid argument" error each time
> madplay starts up.  Any further attempts to use sound via any method or
> app likewise fail.  Sound remains broken until a reboot.
> Upgraded the system again yesterday, to the new "sound" drivers, same
> results.
> I've attached truss output from one of these failed madplay runs.

I suspect that the sound driver is getting interrupt timeouts and is
marking the channel dead.  Do you see the following message in
	 play interrupt timeout, channel dead
If so, I've seen other reports of this.

I think the chn_write() code needs some careful analysis ...


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