Nut upsdev - Aug 2005 - RE: newhidups and APC Back-UPS CS 350 (Thomas Jarosch)

Thomas,

The none (-22) message in your log is an errno from the 
libusb_get_interrupt() call in HIDGetEvents() in libhid.c. 
It indicates an invalid ioctl type.

In HIDGetEvents() there is a comment with that call:
	/* needs libusb-0.1.8 to work => use ifdef and autoconf */
You may want to make sure your libusb is up-to-date.

Hope this helps, AG

-- 
 ----------------------------------------------------------------------
   Alfred Ganz					alfred-ganz@agci.com
   AG Consulting, Inc.				(203) 624-9667
   440 Prospect Street # 11
   New Haven, CT 06511
 ----------------------------------------------------------------------

Alfred,

On Thursday 18 August 2005 15:40, you wrote:
> The none (-22) message in your log is an errno from the
> libusb_get_interrupt() call in HIDGetEvents() in libhid.c.
> It indicates an invalid ioctl type.
>
> In HIDGetEvents() there is a comment with that call:
> 	/* needs libusb-0.1.8 to work => use ifdef and autoconf */
> You may want to make sure your libusb is up-to-date.
Strange, I'm using libusb-0.1.10a.
Though it could be a kernel header mismatch,
I'll investigate this one further. Thanks.

Thomas

On 8/18/05, Alfred Ganz <alfred-ganz+nut@agci.com>
wrote:
> In HIDGetEvents() there is a comment with that call:
>         /* needs libusb-0.1.8 to work => use ifdef and autoconf */
> You may want to make sure your libusb is up-to-date.
I think the "needs libusb-0.1.8" comment refers to the call to detach
the kernel HID driver, which was first available in libusb 0.1.8. The
EINVAL error is probably not related to the version.

-- 
- Charles Lepple

> > In HIDGetEvents() there is a comment with that call:
> >         /* needs libusb-0.1.8 to work => use ifdef and autoconf */
> > You may want to make sure your libusb is up-to-date.
>
> I think the "needs libusb-0.1.8" comment refers to the call to
detach
> the kernel HID driver, which was first available in libusb 0.1.8. The
> EINVAL error is probably not related to the version.
exact. if you get EINVAL (-22), this means that there is a problem
with interrupt handling. Otherwise, you should either get notifications
or ETIMEOUT.

Try to generate events when the driver is waiting for notification
(ie you got 5 sec to unplug the UPS power cord).

Alfred might have some more info about apc interrupt support.

Arnaud