[Nut-upsdev] megatec_usb and "fry's" UPS

[Arnaud Quette]

2009/10/20 Craig Falconer <suppliers at totalteam.co.nz>:
> Gidday all - I've got a 1700VA dynamix UPS which is USB.

Hi Craig,

> The previous model (with a serial port) worked wonderfully with megatec,
> but this new one with USB is not working.
>
> It feels like the kernel is not handing the USB device properly.
> The web has not yeilded any useful info.
>
> What can I do from here?
>
> ===========================================
> [root at hera ups]# lsusb
> Bus 006 Device 002: ID 0001:0000 Fry's Electronics

ouch, not that clean: these kind of VendorID (and productID) is
completly not complying to USB standards!

anyway, this (0001:0000) is already supported by megatec_usb (krauler
subdriver)...

> [root at hera ups]# megatec_usb -DD -a ups
> Network UPS Tools - Megatec protocol driver 1.6 (2.4.1)
> Serial-over-USB transport layer 0.10
> debug level is '2'
> Checking device (0001/0000) (006/002)
> - VendorID: 0001
> - ProductID: 0000
> - Manufacturer: unknown
> - Product: unknown
> - Serial Number: unknown
> - Bus: 006
> Trying to match device
> Device matches
> failed to claim USB device: could not claim interface 0: Operation not
> permitted
> ...

this is a typical permission issue (as Charles already told).
but you should already have the udev suppport.
as per your lsusb output, you should have an entry with privileges of
664 / root:nut
ie: "ls -l /dev/bus/usb/006/002" should give something like
crw-rw-r-- 1 root nut 189, 769 2009-10-21 11:04 /dev/bus/usb/006/002

otherwise, try to unplug / replug your USB cable to force udev rules
application.

> Sep 15 15:11:06 hera kernel: usb 6-1: new low speed USB device using
> uhci_hcd and address 2
> Sep 15 15:11:07 hera kernel: usb 6-1: string descriptor 0 read error: -32
> Sep 15 15:11:07 hera kernel: usb 6-1: string descriptor 0 read error: -32
> Sep 15 15:11:07 hera kernel: usb 6-1: configuration #1 chosen from 1 choice
> Sep 15 15:11:07 hera kernel: hiddev96: USB HID v1.00 Device [HID
> 0001:0000] on usb-0000:00:1d.0-1
>
>
> The server is an IBM x3200 tower server running centos 5.3
> Linux hera 2.6.18-92.1.22.el5.centos.plus #1 SMP Wed Dec 17 10:50:49 EST
> 2008 i686 i686 i386 GNU/Linux

ah, 2.6.18 on Centos. iirc, there were some USB issue with 2.6.18, and
some have recently surfaced on the nut user list...
something is puzzling me though: this device seems to be a HID one. So
usbhid-ups would be the way to go, *if* it's a real HID compliant
device (unlike some Tripplite units supported by tripplite_usb iirc).
so, depending on your results with megatec_usb, an usbhid-ups debug
output would be needed...

cheers,
Arnaud
-- 
Linux / Unix Expert R&D - Eaton - http://www.eaton.com/mgeops
Network UPS Tools (NUT) Project Leader - http://www.networkupstools.org/
Debian Developer - http://www.debian.org
Free Software Developer - http://arnaud.quette.free.fr/