[Nut-upsuser] MGE Nova 1100 using newhidups on netBSD 3.0

Nevil Thatcher NevilTh at nat.com.au
Thu Mar 2 07:44:19 UTC 2006

Hi Arnaud,

Well I have built & installed libusb 0.1.11.

No difference in behaviour.

Ran the test suite as suggested and noted still getting the input/output
error reported on many (but not all) of the usb_control_msg calls.

In looking at this ,always appeared to be on calls with large buffers ?

On looking through the doco's found that there was a setting in the request
structure passed to ioctl to allow short xfer's. This was not used so
requests were a larger buffer was provided than the data size returned was
generating the input/output errors (I think).

Anyway changed the code in bsd.c (libusb) function usb_control_msg

>From req.ucr_flags = 0;
To   req.ucr_flags = USBD_SHORT_XFER_OK;

And now don't get the input/output errors!.

This hasn't solved the fact that I still get stale data until such time as I
unplug/replug the USB cable but at least after I do that upsc is reporting
UPS related variables which it wasn't before.


bash-3.1# upsc MGENova at localhost
battery.charge: 100
battery.charge.low: 30
battery.runtime: 1000
driver.name: newhidups
driver.parameter.pollinterval: 15
driver.parameter.port: auto
driver.version: 2.0.3
driver.version.data: MGE HID 0.8
driver.version.internal: 0.28
outlet.1.switch: 1
output.voltage: 230.0
ups.delay.shutdown: -1
ups.delay.start: -10
ups.load: 39
ups.model: NOVA 1100 AVR
ups.power.nominal: 1100
ups.status: OL CHRG

Still hunting for the unplug/replug problem....

-----Original Message-----
From: Arnaud Quette [mailto:aquette.dev at gmail.com] 
Sent: Wednesday, 1 March 2006 3:16 AM
To: Nevil Thatcher
Cc: nut-upsuser at lists.alioth.debian.org
Subject: Re: [Nut-upsuser] MGE Nova 1100 using newhidups on netBSD 3.0

2006/2/28, Nevil Thatcher <NevilTh at nat.com.au>:
> ...
> Looking at the libusb project they are recommending to use libusb 0.1.11
> I will download an build that and see if that helps.
> ...

a good thing would be to also try the libusb test tools (under the test/


More information about the Nut-upsuser mailing list