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

[Dan S]

I had good results by RT-patching the array kernel
http://array.org/ubuntu/ , apart from the wifi sometimes causes xruns,
which is OK for me cos I don't do network performances...

Dan


2009/7/22 sh0099 <sh0099 at gmx.de>:
> 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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>>
>
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