Accessing a USB device

[Janina Sajka]

Sounds like you've covered the basic points correctly, Chuck. At this
point, it's a search and repair mission, I guess. Sorry I have no wisdom
to add.

Chuck Hallenbeck writes:
> Hi Janina,
> 
> Thanks for the URL. I have built the uhci_hcd driver into the kernel, 
> and have selected usb_hid, usb_hiddev, usb_devicefs, and so on, and the 
> software components seem to be in place. But something very strange is 
> going on with my hardware. I cannot figure out why IRQ 5 is misbehaving 
> and becoming disabled shortly after bootup. The uhci_hcd driver wants to 
> use IRQ 5, but when it fails, communication with the UPS fails. I can 
> still "see" the device. Unplugging it produces a disconnect message, and 
> plugging it back in produces a recognition message with make and model 
> of the UPS displayed, followed by a "failed to register" message.
> 
> I have been relying on the very extensive manual accompanying the 
> software I want to use, "apcupsd," but will give the web site a look 
> that you mentioned.
> 
> Joseph L. thinks it is a kernel configuration problem, but I'm damned if 
> I can figure out what. I am running 2.6.11.11 on this Debian system, 
> although the kernel is not a Debian package and I have configured and 
> compiled it the old fashioned (Slackware) way! Some old dogs just cannot 
> be taught new tricks.
> 
> One other anomaly that makes me think Joseph might be correct: My bootup 
> messages end with a complaint about an "unknown_bootoption" followed by 
> an offset of some sort, but I have only specified the usual 
> "speakup_synth=ltlk" option explicitly. If that is what it is 
> complaining about, it is a benign message. But if it is something else, 
> I cannot imagine what it might be.
> 
> Chuck
> 
> 
> On Thu, 23 Jun 2005, Janina Sajka wrote:
> 
> >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
> >
> 
> -- 
> The Moon is Waning Gibbous (95% of Full)
> But you can still get downloads from http://www.mhcable.com/~chuckh
> 
> _______________________________________________
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-- 

Chair, Accessibility Workgroup		Free Standards Group (FSG)
janina at freestandards.org		http://a11y.org

Janina Sajka				Phone: +1.202.494.7040
Partner, Capital Accessibility LLC	http://www.CapitalAccessibility.Com

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