linux-kernel - Re: [Alsa-user] [alsa-devel] Crash 2.6.32.x, Echo 3G, Alsa, SCSI

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Date:	Fri, 18 Jun 2010 13:55:09 +0200
From:	Giuliano Pochini <pochini@...ny.it>
To:	"F. Heitkamp" <heitkamp@...ritech.net>
Cc:	alsa-devel@...a-project.org, Takashi Iwai <tiwai@...e.de>,
	linux-audio-user@...ts.linuxaudio.org,
	Clemens Ladisch <clemens@...isch.de>,
	linux-kernel@...r.kernel.org, alsa-user@...ts.sourceforge.net
Subject: Re: [Alsa-user] [alsa-devel] Crash 2.6.32.x, Echo 3G, Alsa, SCSI

On Thu, 17 Jun 2010 08:11:06 -0400
"F. Heitkamp" <heitkamp@...ritech.net> wrote:

> >> My goal is to be able to plug in a MIDI keyboard, or USB guitar
> >> interface and play along with songs etc.
> >>
> >> I plugged in a MIDI keyboard, "/proc/asound/cards" showed the keyboard
> >> was recognized.  The keyboard has a USB and MIDI interface.
> >> I am not sure if they both work at the same time.  I had the MIDI cable
> >> plugged into the Gina3G, but I could not tell if the keyboard was
> >> recognized.
> >> I compiled csound5.  When I engaged it the system immediately froze and
> >> started spitting out:
> >> [...]
> > Ok, I compiled csound, but I don't know how to use it. How can I reproduce
> > the problem ?
> >
> Sorry I took so long to get back to you.
> It turns out Csound is not related to the problem.
> 
> In this case I am only using kernel 2.6.33.5-rt23-amd64, alsa lib 1.0.2, 
> but 2.6.34 does it too.
> I bring up firefox.  Web pages attempt to play sound.   The kernel 
> begans doing:
> 
> [ 2879.766331] allocate_pipes: ch=1 int=2
> [ 2879.766332] allocate_pipes: channel already open
> [ 2879.766333] allocate_pipes(1) err=-11
> [ 2879.766334] pcm_hw_freed
> [ 2.821190] pcm_analog_out_open  cs=0  oc=2  r=44100
> [ 2879.821266] allocate_pipes: ch=1 int=2
> [ 2879.821267] allocate_pipes: channel already open
> 
> ,infinitely.  The system is unusable at this point and I have to 
> Alt-SysRq-k to get back in.
> 
> Let me know what other information to provide.

Perhaps is it related with the OSS emulation ?  Do you know if the browser
plays the sound itself or if it is using an external program or plugin ?


-- 
Giuliano.
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