From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from concerto.rednote.net ([66.92.170.139]) by speech.braille.uwo.ca with esmtp (Exim 3.36 #1 (Debian)) id 1DlZ8H-0000uB-00 for ; Thu, 23 Jun 2005 17:21:09 -0400 Received: from concerto.rednote.net (localhost.localdomain [127.0.0.1]) by concerto.rednote.net (8.13.4/8.13.4) with ESMTP id j5NLL8UU032659 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Thu, 23 Jun 2005 17:21:08 -0400 Received: (from janina@localhost) by concerto.rednote.net (8.13.4/8.13.4/Submit) id j5NLL8Km032658 for speakup@braille.uwo.ca; Thu, 23 Jun 2005 17:21:08 -0400 Date: Thu, 23 Jun 2005 17:21:08 -0400 From: Janina Sajka To: "Speakup is a screen review system for Linux." Message-ID: <20050623212108.GD15544@rednote.net> Mail-Followup-To: "Speakup is a screen review system for Linux." References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.1i X-Operating-System: Linux concerto.rednote.net 2.6.11-1.14_FC3spksmp Organization: Capital Accessibility LLC (http://www.CapitalAccessibility.com) X-PGP-Key: http://www.CapitalAccessibility.com/JaninaSajka_gpg_key.html Subject: Re: Accessing a USB device X-BeenThere: speakup@braille.uwo.ca X-Mailman-Version: 2.1.5 Precedence: list Reply-To: "Speakup is a screen review system for Linux." List-Id: "Speakup is a screen review system for Linux." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 23 Jun 2005 21:21:09 -0000 Do you have an uhci-hcd module loaded? I have the following statement in my (Fedora) /etc/modprobe.conf: alias usb-controller uhci-hcd I found the following web site helpful, by the way: http://www.linux-usb.org/USB-guide/book1.html Chuck Hallenbeck writes: > I am trying for the first time to access a USB device and having a > problem doing so. The device is my new UPS from American Power > Conversion, which I plan to monitor with a program called apcupsd. The > manual describes how to configure my system for USB and how to test the > USB interface before running the program, and that is where I am stuck. > > It appears to me to be an interrupt problem. Here is why I think so. For > the past month or two I have noticed a peculiarity that happens within > about a minute after booting up the computer. Normally I start logging > in various users on difference consoles, and while I am doing that, I > get a spontaneous message saying that IRQ 5 is being disabled. The > message says something cute like, "Nobody cares!" and then disables IRQ > 5. Examining the IRQ assignments, I see that the only device assigned to > that IRQ shown in /proc/interrupts is the uhci-hcd driver. That has not > been a problem until now, since until now I have not attempted to access > a USB device, which requires the uhci-hcd driver. > > When I plug the cable from my UPS into a USB slot, the device is > correctly identified by manufacturer, serial number, etc., but then it > says that it fails to register with usbcore. And the test program > confirms that the device cannot be accessed. > > My kernel is 2.6.11.6, and all the relevant drivers are compiled into > the kernel. It looks to me like the uhci-hcd driver has been assigned to > IRQ 5 but is not responding to that interrupt when it occurs. If someone > has seen this kind of thing before, or has any suggestion how to proceed > with troubleshooting this one, I would sure appreciate hearing about it. > The software I plan to run to monitor the UPS is not involved here as > yet, since I have to resolve the USB interface to the UPS before there > is a hope in hell of that software working. If it would be of value to > share any of the error messages or other data, I would be happy to do > so. > > Any ideas? I have run out. > > Chuck > > > -- > The Moon is Full > But you can still get downloads from http://www.mhcable.com/~chuckh > > _______________________________________________ > Speakup mailing list > Speakup@braille.uwo.ca > http://speech.braille.uwo.ca/mailman/listinfo/speakup -- Chair, Accessibility Workgroup Free Standards Group (FSG) janina@freestandards.org http://a11y.org Janina Sajka Phone: +1.202.494.7040 Partner, Capital Accessibility LLC http://www.CapitalAccessibility.Com Bringing the Owasys 22C screenless cell phone to the U.S. and Canada. Go to http://www.ScreenlessPhone.Com to learn more.