Re: usb-usx2y: playback fails with Tascam US122 on kernel 3.14

[Takashi Iwai <tiwai@suse.de>]

At Wed, 20 Aug 2014 18:50:21 +0100,
Dr Nicholas J Bailey wrote:
> 
> On Wednesday 06 August 2014 19:19:22 Daniel Mack wrote:
> > The best thing you can do is probably bisect the issue:
> > 
> >   https://wiki.ubuntu.com/Kernel/KernelBisection
> > 
> > > I understand that the US-122 is a usb-1.1 device and I have the ehci
> > > module  loaded, but it was there too with the older kernel and that
> > > worked fine.
> > Yes, that shouldn't be an issue. Let us know what the bisection tells you.
> > 
> > 
> > Daniel
> 
> OK, I put aside some time to try and do this and didn't get too far :(
> 
> I'm using debian testing (jessie) so I cloned from
> 
> 	git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
> 
> rather than the ubuntu one, as recommended here:
> 
> 	https://wiki.debian.org/DebianKernel/GitBisect
> 
> The test I wanted to work was to make the command
> 
> 	jackd -u -dalsa -dhw:1,0 -r48000 -p512 -n3
> 
> behave as expected, hw:1,0 being my Tascam US-122 sound box.
> 
> To be sure, I booted up kernel 3.10.11 to which I'd applied patches to make 
> the MIDI interface of the box work. This is documented on the ALSA-devel list 
> a while back. It did. I played audio through it while it was configured duplex 
> at the same time watching a video and building a new kernel.
> 
> I checked out v3.11 from the kernel tree, and built it. When it ran, I got a 
> failure from the same jack command:
> 
> """
> ALSA: poll time out, polled for 15999083 usecs
> JackAudioDriver::ProcessAsync: read error, stopping...
> """
> 
> So far, so good. That can be the bad end of the bisection. The trouble is, 
> building 3.10 resulted in exactly the same error. My version 3.10.11 (which 
> works) is build from the debian source package rather than the kernel source, 
> so presumably the applied patches do something good which makes the sound 
> system happier. Heavens knows what.
> 
> For a laugh I pulled the latest 3.16 source package from the debian repo and 
> built that. This produced the same failure as above.
> 
> So the thing is, I can't make any stock kernel work on my Debian laptop, which 
> means there aren't two points between which to bisect.
> 
> That's all I've got time for at the moment. I'll append the notes I made 
> yesterday and today while the builds and tests were going on, just in case 
> they are any help. At least I have a kernel (3.10.11) that works for now, but 
> unless somebody who really knows what they are doing is going on the case, it 
> looks like its just a matter of time before I'll be buying a whole bunch of 
> new audio interfaces. We have at least 4 or 5 of these Tascam US-122 boxes, 
> and use them quite a lot, so I am nervously fingering my wallet... :(

Try to build 3.10.11 from linux-stable tree manually and see whether
it works.  If yes, there must be a fix between 3.10 and 3.10.11, and
you can bisect it easily.

If the manual built 3.10.11 kernel doesn't work, it's most likely a
kernel config issue, assuming that Debian doesn't put so many own
kernel patches (especially for the sound stuff).


Takashi


> 
> Nick/.
> 
> 8><---
> Linux arial 3.10.11 #1 SMP Wed Oct 2 19:26:59 BST 2013 i686 GNU/Linux
> ---------------------------------------------------------------------
> ** This is the kernel patched with the MIDI device fixes sent to the
>    alsa-dev mail list **
>    
> Works (as nick).
> 
> nick@arial:~/Bisect/linux-stable$ jackd -u -dalsa -dhw:1,0 -r48000 -p512 -n3
> jackdmp 1.9.10
> Copyright 2001-2005 Paul Davis and others.
> Copyright 2004-2014 Grame.
> jackdmp comes with ABSOLUTELY NO WARRANTY
> This is free software, and you are welcome to redistribute it
> under certain conditions; see the file COPYING for details
> no message buffer overruns
> no message buffer overruns
> no message buffer overruns
> JACK server starting in realtime mode with priority 10
> self-connect-mode is "Don't restrict self connect requests"
> audio_reservation_init
> Acquire audio card Audio1
> creating alsa driver ... hw:1,0|hw:1,0|512|3|48000|0|0|nomon|swmeter|-|32bit
> configuring for 48000Hz, period = 512 frames (10.7 ms), buffer = 3 periods
> ALSA: final selected sample format for capture: 24bit little-endian
> ALSA: use 3 periods for capture
> ALSA: final selected sample format for playback: 24bit little-endian
> ALSA: use 3 periods for playback
> ^CJack main caught signal 2
> Released audio card Audio1
> audio_reservation_finish
> 
> ----------------------------------------------------------------------
> Linux arial 3.11.0+ #1 SMP Tue Aug 19 16:28:36 BST 2014 i686 GNU/Linux
> ----------------------------------------------------------------------
> As nick:
> nick@arial:~/Bisect/linux-stable$ jackd -u -dalsa -dhw:1,0 -r48000 -p512 -n3
> jackdmp 1.9.10
> Copyright 2001-2005 Paul Davis and others.
> Copyright 2004-2014 Grame.
> jackdmp comes with ABSOLUTELY NO WARRANTY
> This is free software, and you are welcome to redistribute it
> under certain conditions; see the file COPYING for details
> no message buffer overruns
> no message buffer overruns
> no message buffer overruns
> JACK server starting in realtime mode with priority 10
> self-connect-mode is "Don't restrict self connect requests"
> audio_reservation_init
> Failed to acquire device name : Audio1 error : Device reservation request with 
> priority 2147483647 denied for "Audio1" via RequestRelease()
> Audio device hw:1,0 cannot be acquired...
> Cannot initialize driver
> JackServer::Open failed with -1
> Failed to open server
> 
> (EDIT: That Device reservation request error doesn't seem to be 
> reproducable...?)
> 
> As root:
> nick@arial:~/Bisect/linux-stable$ sudo jackd -u -dalsa -dhw:1,0 -r48000 -p512 
> -n3
> jackdmp 1.9.10
> Copyright 2001-2005 Paul Davis and others.
> Copyright 2004-2014 Grame.
> jackdmp comes with ABSOLUTELY NO WARRANTY
> This is free software, and you are welcome to redistribute it
> under certain conditions; see the file COPYING for details
> no message buffer overruns
> no message buffer overruns
> no message buffer overruns
> JACK server starting in realtime mode with priority 10
> self-connect-mode is "Don't restrict self connect requests"
> audio_reservation_init
> Acquire audio card Audio1
> creating alsa driver ... hw:1,0|hw:1,0|512|3|48000|0|0|nomon|swmeter|-|32bit
> configuring for 48000Hz, period = 512 frames (10.7 ms), buffer = 3 periods
> ALSA: final selected sample format for capture: 24bit little-endian
> ALSA: use 3 periods for capture
> ALSA: final selected sample format for playback: 24bit little-endian
> ALSA: use 3 periods for playback
> ALSA: poll time out, polled for 15999083 usecs
> JackAudioDriver::ProcessAsync: read error, stopping...
> 
> -------------------
> Building 3.10:
> 
> scripts/kconfig/conf --silentoldconfig Kconfig
> include/config/auto.conf:2221:warning: symbol value 'm' invalid for 
> USB_OHCI_HCD_PCI
> 
> ... Changed to "y", try again ...
> 
> Same result (whether root or not):
> 
> nick@arial:~/Bisect$ uname -a
> Linux arial 3.10.0 #3 SMP Wed Aug 20 13:53:56 BST 2014 i686 GNU/Linux
> nick@arial:~/Bisect$ jackd -u -dalsa -dhw:1,0 -r48000 -p512 -n3
> jackdmp 1.9.10
> Copyright 2001-2005 Paul Davis and others.
> Copyright 2004-2014 Grame.
> jackdmp comes with ABSOLUTELY NO WARRANTY
> This is free software, and you are welcome to redistribute it
> under certain conditions; see the file COPYING for details
> no message buffer overruns
> no message buffer overruns
> no message buffer overruns
> JACK server starting in realtime mode with priority 10
> self-connect-mode is "Don't restrict self connect requests"
> audio_reservation_init
> Acquire audio card Audio1
> creating alsa driver ... hw:1,0|hw:1,0|512|3|48000|0|0|nomon|swmeter|-|32bit
> configuring for 48000Hz, period = 512 frames (10.7 ms), buffer = 3 periods
> ALSA: final selected sample format for capture: 24bit little-endian
> ALSA: use 3 periods for capture
> ALSA: final selected sample format for playback: 24bit little-endian
> ALSA: use 3 periods for playback
> ALSA: poll time out, polled for 15999090 usecs
> JackAudioDriver::ProcessAsync: read error, stopping...
> 
> 
> ------------------------------------------------------------------------------
> Linux arial 3.14-2-686-pae #1 SMP Debian 3.14.15-2 (2014-08-09) i686 GNU/Linux
> ------------------------------------------------------------------------------
> nick@arial:/usr/src/linux-3.16$ jackd -u -dalsa -dhw:1,0 -r48000 -p512 -n3  
> jackdmp 1.9.10
> Copyright 2001-2005 Paul Davis and others.
> Copyright 2004-2014 Grame.
> jackdmp comes with ABSOLUTELY NO WARRANTY
> This is free software, and you are welcome to redistribute it
> under certain conditions; see the file COPYING for details
> no message buffer overruns
> no message buffer overruns
> no message buffer overruns
> JACK server starting in realtime mode with priority 10
> self-connect-mode is "Don't restrict self connect requests"
> audio_reservation_init
> Acquire audio card Audio1
> creating alsa driver ... hw:1,0|hw:1,0|512|3|48000|0|0|nomon|swmeter|-|32bit
> configuring for 48000Hz, period = 512 frames (10.7 ms), buffer = 3 periods
> ALSA: final selected sample format for capture: 24bit little-endian
> ALSA: use 3 periods for capture
> ALSA: final selected sample format for playback: 24bit little-endian
> ALSA: use 3 periods for playback
> ALSA: cannot set hardware parameters for playback
> ALSA: cannot configure playback channel
> Cannot initialize driver
> JackServer::Open failed with -1
> Failed to open server
> 
> Build latest 3.16 from source package in debian experimental...
> 
> Same result.
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