Bug#718825: linux-image-3.10-1-amd64: Sound freezes when using usb audio card
Hi Steve,
I've started using the usb audio card with the kernel 3.9(I' and I had
this issue.
---
Serghei Mihai
On Tue, 6 Aug 2013 09:46:50 +0100, Steve Cotton
<steve@s.cotton.clara.co.uk> wrote:
> On Mon, Aug 05, 2013 at 11:30:26PM +0200, Sergheu Mihai wrote:
>> Since a couple on months, I'm using an external usb sound card(Scarlett
>> Focusrite 2i2) for some audio production.
>>
>> I use it mainly with jackd, zynaddsubfx, fluidsynth.
>>
>> Constantly I face some sound freezes when using the card and the kernel reports
>> me the following:
>> [89828.051969] cannot submit urb (err = -18)
>> [89828.051974] cannot submit urb (err = -18)
>> [89828.051982] cannot submit urb (err = -18)
>> [89828.051988] cannot submit urb (err = -18)
>
> Hi Sergheu,
>
> In this context errno 18 (EXADEV) could mean that audio data is
> arriving at the USB stack too late. I'm wondering if it's simply
> that the userland programs can't keep up.
>
> Was it working correctly when you first bought it, and if so,
> which is the last kernel version that it worked on?
>
> Does it freeze when playing simple audio (.wav files for
> example)?
>
> Using the synth programs, are you just playing back prerecorded
> sounds? Are you using it as a live musical instrument (pressing
> buttons and needing the sound to change immediately)?
>
> What's the load / cpu usage on your laptop just before the sound
> freezes?
>
> Could you try turning off swap (to eliminate a cause of latency)?
>
> From the hardware, I'm guessing it's an old laptop. Please could
> you retest on a more powerful PC?
>
> Regards,
> Steve
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