On Sun, 2011-12-04 at 19:50 -0500, Peter Colberg wrote:
> Package: linux-2.6
>
> Version: 3.1.4-1
> Severity: normal
> Tags: upstream patch
>
> Dear Maintainer,
>
> After upgrading to newer hardware as detailed below (PCI devices), my
> Turtle Beach USB Audio card stopped working with Twinkle, a VoIP SIP
> client. Upon starting Twinkle, it fails to detect the speaker and
> microphone devices with the following error messages:
>
> Sun 19:36:53
> Critical: Opening ALSA driver failed: snd_pcm_start failed: Broken pipe
>
> Sun 19:36:53
> Critical: Opening ALSA driver failed: snd_pcm_start failed: Broken pipe
> Twinkle 1.4.2, 25 February 2009
>
> This coincides with the following kernel messages:
>
> [44368.330704] cannot submit datapipe for urb 0, error -28: not enough bandwidth
> [44368.387786] cannot submit datapipe for urb 0, error -28: not enough bandwidth
>
> The same kernel message has been reported [1] to occur with a
> different USB audio card, and a patch has been proposed [2].
>
> [1] https://bugzilla.redhat.com/show_bug.cgi?id=527813
>
> [2] http://marc.info/?l=linux-usb&m=131973404328622
>
> Using the test-patches script described in the Debian Linux Kernel
> Handbook, I compiled a custom Debian kernel with the patch [2]
> applied, and indeed this resolves the issue. With this fix, the
> Turtle Beach USB Audio card works with Twinkle again.
Thanks for doing this testing in advance.
> Could this patch be applied to the Debian kernel?
>
> The comment hinting the patch [4] suggests it has not been merged for 3.2.
[...]
It has been included in 3.2-rc3 as:
commit 811c926c538f7e8d3c08b630dd5844efd7e000f6
Author: Thomas Poussevin <thomas.poussevin@parrot.com>
Date: Thu Oct 27 18:46:48 2011 +0200
USB: EHCI: fix HUB TT scheduling issue with iso transfer
This seems to require a further fix which is in Linus's tree but not yet
released:
commit e3420901eba65b1c46bed86d360e3a8685d20734
Author: Matthieu CASTET <castet.matthieu@free.fr>
Date: Mon Nov 28 11:30:22 2011 +0100
EHCI : Fix a regression in the ISO scheduler
I'll apply both of these.
Ben.
--
Ben Hutchings
Absolutum obsoletum. (If it works, it's out of date.) - Stafford Beer
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