[alsa-devel] Timer instability

Colin Guthrie gmane at colin.guthr.ie
Mon Feb 23 20:24:45 CET 2009

'Twas brillig, and Lennart Poettering at 23/02/09 19:20 did gyre and gimble:
> On Mon, 23.02.09 03:56, Lennart Poettering (mznyfn at 0pointer.de) wrote:
>> Hmm, for now my little testing experiment I've now found es1969,
>> ens1371, intel8x0, snd-emu10k1 and some intel-hda to have unreliable
>> _avail() or _delay().
> And here's the output for HDA STAC92xx:
> http://pastebin.mandriva.com/7149

I realised that post will timeout after a month, so here is a longer 
term one :)


> The first dump is the interesting one: when audio starts to play the
> buffer abruptly runs empty in just 20us after the device started. (The
> rightmost column is the state btw, 3 == playing).
> A quick overview of cards where _delay() and/or _avail() are unreliable:
>  es1969
>  ens1371
>  intel8x0
>  emu10k1
>  intel-hda on STAC92xx
>  intel-hda on AD1989B
> Lennart


Colin Guthrie

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