Re: [HANG] Trouble with NEC-based USB adapter in PCMCIA slot onE7110

From: Alan Stern
Date: Fri Aug 09 2013 - 13:46:47 EST

On Fri, 9 Aug 2013, Thomas Richter wrote:

> Hi Alan, hi Dominik,
> maybe you want me to help out a bit - I'm having trouble getting a
> Delock PCMCIA to USB-2 adapter to work under linux, with strange
> behavior in some situations. The trouble is that while I can *read* via
> fast (usb 2.0) transfers from the port, an ehci-triggered write just
> locks up (it does not Oops, though) and I'm pretty much stuck narrowing
> down the problem.

The best way to start will be to enable CONFIG_USB_DEBUG in your kernel
and post the dmesg log. Also post a usbmon trace showing what happens
when you try to write something.

Alan Stern

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