Re: [alsa-devel] Fw: BUG: Kernel panic when disconnecting Edirol USB2 audio interface

[Colin Fletcher <colinf@axicon.com>]

Clemens Ladisch wrote:
  > There is a bug in the EHCI driver that will corrupt memory, use this
> patch:
> http://www.mail-archive.com/linux-usb-devel@lists.sourceforge.net/msg35743.html

After applying this, I can start jackd, record a couple of minutes worth 
of eight tracks in ardour, and stop jackd again with no problems.

For the record, without the patch, as soon as I start jackd I get:
ehci_hcd 0000:00:03.3: fatal command 010010 (park)=0 ithresh=1 Periodic 
period=1024 HALT
ehci_hcd 0000:00:03.3: fatal status 4008 Periodic FLR
and my computer freezes, so that's definite progress. Thank you!

> There seems to be another bug in either the EHCI or the snd-usb-audio
> driver; I'm still getting problems with high speed iso transfers.
> I'm investigating this.

Do let me know if there's anything else you'd like me to test.

Colin Fletcher

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