Re: pl2303 ttyUSB0: pl2303_open - failed submitting interrupt urb, error -28

Greg KH
2006-06-12T20:51:53Z

On Mon, Jun 12, 2006 at 04:06:22PM -0400, Mark Lord wrote:
> Greg,
>
> With 2.6.17-rc6-git2, I'm seeing this kernel message during start-up:
>
> pl2303 ttyUSB0: pl2303_open - failed submitting interrupt urb, error -28
>
> The pl2303 serial port is part of a USB1.1 Hub/dock device,
> plugged into a USB2 port on my notebook.

Known issue for years. Either plug it directly into the USB 2.0 root
hub, or disable the ehci driver.

> I get the same failure again when trying to use the port with Kermit.
> This device was working fine here not long ago -- on the -rc5 kernels I
> think.

It's a flaky thing.

Also, look in the -mm tree, there is a fix for this direct error, and
hopefully some ehci fixes that enable the whole thing to work properly.

thanks,

greg k-h