Re: [LAU] UA-101

Colin Fletcher wrote:
> Clemens Ladisch wrote:
> > Please try the patch below, or download the new ua101.c from
> > <http://www.alsa-project.org/~clemens/ua101.c>. This will log the
> > sequence in which the first 50 USB packets are received, but it won't
> > fix anything.
>
> Attached the results of plugging in the UA-1000 and recording

| Feb 24 19:20:21 colinf-laptop kernel: [ 338.470986] completed URB 1
| Feb 24 19:20:21 colinf-laptop kernel: [ 338.471021] completed URB 0
| Feb 24 19:20:21 colinf-laptop kernel: [ 338.471216] completed URB 3
| Feb 24 19:20:21 colinf-laptop kernel: [ 338.471239] completed URB 2
| Feb 24 19:20:21 colinf-laptop kernel: [ 338.471441] completed URB 4
| Feb 24 19:20:21 colinf-laptop kernel: [ 338.471468] completed URB 5
| ...

This is obviously the wrong order.

> I've updated to kernel 2.6.32.9 today and still get the same crash; I
> haven't tried a 2.6.33 kernel yet.

Please try toggling the kernel config option CONFIG_USB_EHCI_TT_NEWSCHED
("Improved Transaction Translator scheduling (EXPERIMENTAL)") of the
EHCI driver. What value does it have at the moment?

Regards,
Clemens
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Received on Thu Feb 25 12:15:02 2010