| title: | USB Audio device syncpipe error |
|
Hello,
I am working on a usb audio device and Im having trouble getting it to show
up as an output device in Ubuntus sound preferences. The device is working
well with other OSs.
My syslog shows this error.
cannot submit syncpipe for urb 0, error -90: internal error
If someone could help me diagnose the source of the problem I would
appreciate it very much.
Here are some more details.
The device operates at high speed but uses USB Audio Class 1.0.
The output endpoint is Isochronous asynchronous and I am using a feedback
endpoint with a 32ms polling interval.
The device works with Ubuntu when running at full speed. (Input and Output
show up in the sound preferences).
At High Speed only the Input shows up in the sound preferences.
From my usb analyzer log I never see a request for the feedback endpoint
when running at HS, while I do see the request at FS.
Cheers,
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