Re: [linux-usb-devel] Re: USB flash "drive" is not working sometimes

From: Alan Stern
Date: Thu Jun 16 2005 - 20:52:14 EST

On Thu, 16 Jun 2005, Denis Vlasenko wrote:

> On Thursday 16 June 2005 10:51, Pete Zaitcev wrote:

> > At this point the device is toast, the microcontroller is not running.
> Do you mean: "this is a problem with the stick. Sometimes its
> electronics simply do not work at first plug in" ?

I agree with the comments posted previously. The stick doesn't always
work right at first plug-in.

> Can USB controller momentarily cut power to the stick, thus electrically
> simulating a replug? I'd likr to try something like this.

In general, no. Most external hubs have that capability, but most host
controllers do not. In any case, Linux does not currently have an API for
powering down USB ports.

Alan Stern

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