Accessing a USB device

[Charles Hallenbeck]

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