[amd64] Sound breakage with snd_ich driver

Conrad J. Sabatier conrads at cox.net
Tue Jul 20 04:55:21 PDT 2004

On 20-Jul-2004 Don Lewis wrote:
> 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
> /var/log/messages?
>        play interrupt timeout, channel dead
> If so, I've seen other reports of this.

Yes, that's exactly right.

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

That, as well as whatever is still causing these:

ad0: TIMEOUT - WRITE_DMA retrying (2 retries left) LBA=123971136

Conrad J. Sabatier <conrads at cox.net> -- "In Unix veritas"

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