[LAU] eeepc 4G and ALSA underrun -> and jack and rt

sh0099 sh0099 at gmx.de
Wed Jul 22 07:23:55 EDT 2009

i have to say that i also have not so nice performance with jack on my 
eeepc 4g with a ubuntu-eee. does anybody knows if there is a rt kernel 
which works well with the eeepc 4g?
i currently run ubuntu-eee 8.04.

ben schrieb:
> Clemens Ladisch a écrit :
>> ben wrote:
>>> i own an eeepc 4G (701) but ALSA makes a lot for underrun withe de Intel
>>> soundcard (snd_hda_intel). Surprisingly, using the OSS emulation works
>>> better.
>> The OSS emulation uses the same ALSA API internally; you should get the
>> same behaviour if you configure your application, whatever it is, to use
>> the same buffer/period sizes for ALSA as it uses for OSS.
> OK. I saw some applications behave better than some other.
> I'll RTFM on buffer/period sizes when the application alow to tweak it, 
> even if this can increase latency.
>>> Is it possible to tell to snd_hda_intel to force the use of the
>>> soundcard in a better IRQ ?
>> No, I/O-APIC interrupts (above 15) are hardwired.
>> Best regards,
>> Clemens
> Thank you for the explanation on IRQs.
> Benoît
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