[Nut-upsuser] Support removed for newer Belkin 1200 VA UPS?

[Arjen de Korte]

Justin Piszcz wrote:

>> Beats me, I'm not the author of this driver. But now that nut-2.2.0 has
>> been released, you should first check if the problem still exists in
>> that version. We've had quite some changes since nut-2.0.5 came out, so
>> chances are the problem no longer exists.

In the mean time, I had time to talk to the author. This is a bug in the
UPS, not in NUT. The problem is that when we receive a report
'UPS.PowerSummary.BelowRemainingCapacityLimit' (which triggers the low
battery warning) on the interrupt pipeline (uninvited), it is wrong (bug
in the UPS firmware). Only when we specifically ask for this report, it
will show the right information.

Previously we ignored this report through a gross hack in usbhid-ups,
but this no longer works because of caching in the underlying routines
(which is badly needed to prevent beating UPSes to death with repeatedly
asking for the same information). Unfortunately, this will also cache
the bogus information we receive from your UPS, which will pop up once
in while when the cache hasn't expired.

> Is there an ETA for 2.2.0 in Debian-testing?

That one will have the same problems. We need to work around this
(preferably in the belkin-hid subdriver), so upgrading to nut-2.2.0 will
make no difference. Please note that this is due to a bug in the UPS
software (sending out erroneous information), not in NUT. We'll keep you
informed, so that when an updated version is available for testing, you
can try it out. Can you compile NUT from the sources?

Best regards, Arjen