Re: 2.6.31.4: USB/UPS connectivity issue on Intel DP55KG Motherboard[DEBUG logs included upsd/upsmon/usbhid-ups]

[Alan Stern]

On Sun, 18 Oct 2009, Justin Piszcz wrote:

> >> I have included debugging logs-- see below, is this a nut or kernel/USB 
> >> subsystem issue?
> >> 
> >> Robert/Nut User List--
> >> 
> >> Looks like the data goes stale, please let me know if any more 
> >> logs/debugging is required, is this a kernel/usb problem or a nut issue? I 
> >> recall a change in the USB subsystem a few kernel versions back caused a 
> >> different issue (on a different UPS, but nevertheless it was kernel 
> >> related).
> >
> 
> The details+logs are here (previous e-mail did not go through, too large for
> the list):
> wget http://home.comcast.net/~jpiszcz/20091014/nut-problem.txt
> 
> For now I have disabled nut-- is there any more debugging that I can do to
> help find/solve the problem?  Also cc'ing linux-usb & linux-kernel on this 
> one.

You could collect a usbmon trace showing the problem.  For 
instructions, see the kernel source file Documentation/usb/usbmon.txt.

It might also help to provide the dmesg log from a kernel built with 
CONFIG_USB_DEBUG enabled.

Alan Stern

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