From: Alan Stern <stern@rowland.harvard.edu>
To: Denis Vlasenko <vda@ilport.com.ua>
Cc: Pete Zaitcev <zaitcev@redhat.com>, <linux-kernel@vger.kernel.org>,
<linux-usb-devel@lists.sourceforge.net>, <gregkh@suse.de>,
<dbrownell@users.sourceforge.net>,
<mdharm-usb@one-eyed-alien.net>
Subject: Re: [linux-usb-devel] Re: USB flash "drive" is not working sometimes
Date: Thu, 16 Jun 2005 21:48:36 -0400 (EDT) [thread overview]
Message-ID: <Pine.LNX.4.44L0.0506162145340.31849-100000@netrider.rowland.org> (raw)
In-Reply-To: <200506161135.42392.vda@ilport.com.ua>
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
prev parent reply other threads:[~2005-06-17 1:48 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-16 6:33 USB flash "drive" is not working sometimes Denis Vlasenko
2005-06-16 7:36 ` Matthew Dharm
2005-06-16 7:51 ` Pete Zaitcev
2005-06-16 8:35 ` Denis Vlasenko
2005-06-17 1:48 ` Alan Stern [this message]
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