Re: snd-usb-usx2y 0.7.1 against cvs head: please test it!

[Karsten Wiese <annabellesgarden@yahoo.de>]

Am Mittwoch 14 Juli 2004 20:34 schrieb Werner Schweer:
> On Wednesday 14 July 2004 19:41, Werner Schweer wrote:
> > On Wednesday 14 July 2004 19:19, Karsten Wiese wrote:
> > > > testing on 2.6.7-bk20 i get the following message when starting
> > > > JACK:
> > > >
> > > > ALSA lib pcm_hw.c:549:(snd_pcm_hw_start) SNDRV_PCM_IOCTL_START
> > > > failed: Broken pipe
> > > > could not start playback (Broken pipe)
> > > > jackd watchdog: timeout - killing jackd
> > > >
> > > > the system log says:
> > > >
> > > > Jul 14 18:40:53 t10 vmunix:
> > > > ALSA
> > > > /home/ws/projects/alsa/alsa-driver/kbuild/../usb/usx2y/usbusx2yaudio.
> > > >c: 24 6: -28
> > >
> > > #define	ENOSPC		28	/* No space left on device */
> > >
> > > If you didn't try yet,
> > > please start Jack with the -S alsa driver option to use 16bit format.
> > > Using 24bit on kernels with "uhci debugging" I get lots of dmesg
> > > warnings complaining about overusing the usb - bandwidth although
> > > everything works fine. Using 16bit the kernel doesn't complain.
> > > Maybe usb bandwidth checks are broken?
> > >
> > > > Jul 14 18:40:53 t10 vmunix:
> > > > ALSA
> > > > /home/ws/projects/alsa/alsa-driver/kbuild/../usb/usx2y/usbusx2yaudio.
> > > >c: 34 7: Sequence Error!(ep=10;nuc=1,frame=860)
> > > > Jul 14 18:40:53 t10 vmunix:
> > > > ALSA
> > > > /home/ws/projects/alsa/alsa-driver/kbuild/../usb/usx2y/usbusx2yaudio.
> > > >c: 34 7: Sequence Error!(ep=8;nuc=1,frame=860)
> >
> > starting jackd with -S (force 16bit format) works!
>
> but only for about 20 minutes, then jackd dies with same error, same
> system error message :-(

if your kernel is currently configured with CONFIG_USB_BANDWIDTH=y
(and you like to spend some more time testing):
Please recompile the kernel without that option and retry.
the relevant part of the .config would look like:
>>>>>>
#
# Miscellaneous USB options
#
CONFIG_USB_DEVICEFS=y
# CONFIG_USB_BANDWIDTH is not set
# CONFIG_USB_DYNAMIC_MINORS is not set
<<<<<<

karsten


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