[alsa-devel] snd-usb endpoint rework
blablack at gmail.com
Mon May 21 20:45:19 CEST 2012
> Can you try using something like xmms maybe? I'm interested whether the
> audio interface does consume any data or if the whole thing is stuck.
This is now getting weirder and weirder, but here are the results of
Yesterday and today, I have been running the Kernel 3.2.16 with the Alsa git.
Yesterday I couldn't play any sound whatsoever with the FTU, and the
UA25-Ex was dying out after a few minutes.
(the testing is done using VLC connecting directly to ALSA, I removed
pulseaudio from Ubuntu a few days ago to eliminate that as a possible
The first time I started my laptop with the FTU plugged - no sound,
VLC is not hanging (I can see playing time move along).
Unplugged the FTU, plugged back - VLC is now playing sound, but the
sound quality is very "low-def" (I'm not sure how to explain that
Restarting my laptop, FTU plugged in - VLC is now playins sound, still
with very poor sound quality.
Restarting my laptop with the UA-25Ex plugged in - VLC is working ok,
sound quality is good, been running it for 10 minutes without a
Im both cases, starting Jack results in an immediate freeze of my
laptop with CPU going 100% (I guess, as the laptop fan is going
crazy), and I guess it is related as running Jack on the previous
driver/original Ubuntu kernel is ok.
>> Although the mixers are ok, I'm starting to wonder if they might still
>> be muted.
> There were some other patches to augment the mixer routing
> possibilities. Not sure if that has any relation to your issues, but I
> doubt it.
>> - I haven't tested the UA-25Ex with that setup, I'll try that this evening.
>>>> When the sound dies out, dmesg prints:
>>>> [ 550.114621] urb status -32
>>>> [ 551.601237] urb status -32
>>>> [ 551.681206] urb status -32
>>>> [ 553.563336] urb status -32
>>>> [ 565.588044] urb status -32
>>>> [ 566.786965] urb status -32
>>>> [ 625.130221] cannot submit urb 0, error -28: not enough bandwidth
>>>> If there is any other info I can provide, let me know,
>>> Can you provide more context of the logs?
I cannot reproduce this problem anymore. If I encounter it again, I'll
save a trace of the dmesg.
It's quite hard to provide you with proper info as it almost looks
like everyday produce a new scenario.
If there is anything I can provide to help, let me know,
More information about the Alsa-devel