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

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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.

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.

Unplugging the hub/dock does this:

kernel BUG at kernel/workqueue.c:110!
invalid opcode: 0000 [#1]
PREEMPT
...

MMmm.. entire USB subsystem is toast after that -- reboot required.

Cheers
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