Hi,

I've some strange problems with some uhci controllers. The device suffering
from that problems is a dual Philips UDA132X sound board which has an
integrated Winbond hub. This hub is then connected to the computer.

On some computers (all of them have uhci controllers) i get audio dropouts
(duration appr. 0.5sek). At the same time the message "usb-uhci.c:
iso_find_start: gap in seamless isochronous scheduling" is printed on the
console/syslog.

Any ideas/hints what might be wrong? We're using latest kernel (even tried
usb bk with no success) and latest alsa usb drivers. PCI latency issues?

There are some tuning options in usb-uhci.c. Should i try to play with them?
What do you suggest?

Thanks a lot!

Regards,
   Florian




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