Distribution: Debian Unstable (sid)
Hardware Environment: Celeron i810 board, uhci/ohci controlers, various MGE UPSs
Software Environment: kernel + Network UPS Tools (hidups driver

Problem Description: some hid events are lost. In fact, userland layer only see
a 0x0 event ! This seems better between 2.5.69 and 2.5.70-bk13, as on the former
I was losing all important events (ACPresent = 0, ...), while the later only
lose it sometimes.

Steps to reproduce: having the kernel with hiddev compiled in, start NUT hidups
driver in debug mode (-DD) and unplug the power from the UPS to generate some
interrupt events. You should see some:
>Unhandled event: 0x0 (%value)

With a bit of "chance", one of this event should be an "important" and visible
one, such as the power failure (ACPresent = 0), thus you won't see that you're
now on battery. Loosing a LowBattery would result in UPS to shutoff without the
protected system to have shutdown.

Lastly, note that this is 2.5 related (I've never seen 0x0 events in 2.4)