From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752902Ab2DPKbg (ORCPT ); Mon, 16 Apr 2012 06:31:36 -0400 Received: from forward3.mail.yandex.net ([77.88.46.8]:44053 "EHLO forward3.mail.yandex.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752009Ab2DPKbf (ORCPT ); Mon, 16 Apr 2012 06:31:35 -0400 X-Greylist: delayed 470 seconds by postgrey-1.27 at vger.kernel.org; Mon, 16 Apr 2012 06:31:34 EDT Date: Mon, 16 Apr 2012 14:22:35 +0400 From: Oleg To: linux-kernel@vger.kernel.org Subject: usb-to-serial converter problem Message-ID: <20120416102235.GA22599@localhost> Reply-To: Oleg MIME-Version: 1.0 Content-Type: text/plain; charset=koi8-r Content-Disposition: inline User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, all. I have a strange problem with my usb-to-serial converter TU-S9 (http://www.trendnet.com/products/proddetail.asp?prod=265_TU-S9&cat=32). When i attach it, i see /dev/ttyUSB0 device, but i cann't communicate with a switch console from minicom. minicom show nothing, just like no switch at all on another side of TU-S9. On my old notebook dell inspiron 1501 it worked fine, on another machine it works fine, but on my new dell inspiron n5110 it doesn't work correctly. Now I'm using Debian 6, vanilla kernel 3.2.14. When TU-S9 is connected, dmesg show: usb 3-2: new full-speed USB device number 3 using xhci_hcd xhci_hcd 0000:0b:00.0: WARN: short transfer on control ep xhci_hcd 0000:0b:00.0: WARN: short transfer on control ep xhci_hcd 0000:0b:00.0: WARN: short transfer on control ep pl2303 3-2:1.0: pl2303 converter detected usb 3-2: pl2303 converter now attached to ttyUSB0 What i do wrong? May be the problem exist bacause of inspiron n5110 have no usb 1.1 host? Thanks.