Re: arecord pcm_read error

[kmpirkos@xxxxxxxxxxxxxx]

Thank you for your answer. I would like to add that the problem does not occur in Ubuntu 10.10 neither, even if I use a USB hub. So, do you think that updating the ehci_hcd driver can solve the problem?

On Tue, 12 Jul 2011 02:14 PM, Clemens Ladisch <cladisch@xxxxxxxxxxxxxx> wrote:

Konstantinos Birkos wrote:
> I am using an external USB audio capturing device (XLR to USB converter)
> that is connected via a USB hub to a system running Voyage Linux. When
> trying to record using the arecord utility, I get the following error:
>
> arecord: pcm_read: 1692: read error: Input/output error
>
> The error does not occur when I connect the USB audio device directly to
> the USB port of the board.

This is a bug in the ehci_hcd driver; it is not always able to correctly
schedule full speed audio transfers through a high speed hub because it
thinks that there is not enough bandwidth.


Regards,
Clemens

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