Nut upsdev - Mar 2010 - Tripplite USB 3003 problems

I have been having a few issues recently. I'm running Nut 2.4.3 on
Solaris 10 (10/09) using a TrippLite SMART700DVa UPS. Everything seems
to be working fine except for some random issues. During a power cycle
(UPS online to offline to online) NUT will occasionally get disconnected
from the UPS. A call to it using upsc results in "Error: Data stale".
And running dmesg has the following messages:

 

                UPS ups at localhost on line power 

                UPS ups at localhost on battery

                Data for UPS [ups] is stale - check driver

                Poll UPS [ups at localhost] failed - Data stale

                Last message repeated 2 times

 

This will only happen once in every 50 times or so. I am not sure where
to look for the problem. Could it be a problem in NUT? Or Solaris or the
libusb? Or could it be a problem with the UPS? It has occurred on
different machines with different UPS's, so I don't think it is a
hardware issue. Has anyone else seen a problem like this? Or could point
me in the right direction to get this problem resolved? 

 

 

Chase Wallis

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On Wed, Mar 24, 2010 at 11:35 AM, Wallis, Chase Civ USAF AFMC 519
SMXS/MXDEA <Chase.Wallis at hill.af.mil> wrote:
> I have been having a few issues recently. I?m running Nut 2.4.3 on Solaris
> 10 (10/09) using a TrippLite SMART700DVa UPS. Everything seems to be
working
> fine except for some random issues. During a power cycle (UPS online to
> offline to online) NUT will occasionally get disconnected from the UPS. A
> call to it using upsc results in ?Error: Data stale?. ?And running dmesg
has
> the following messages:
>
>
>
> ??????????????? UPS ups at localhost on line power
>
> ??????????????? UPS ups at localhost on battery
>
> ??????????????? Data for UPS [ups] is stale ? check driver
>
> ??????????????? Poll UPS [ups at localhost] failed ? Data stale
>
> ??????????????? Last message repeated 2 times
After this, is the tripplite_usb process still running?

I don't know the default syslog configuration on Solaris anymore, but
is there a more detailed system log than what "dmesg" prints? At the
LOG_INFO level, the tripplite_usb driver prints out a message if it
has given up on reconnecting to the UPS.
> This will only happen once in every 50 times or so. I am not sure where to
> look for the problem. Could it be a problem in NUT? Or Solaris or the
> libusb? Or could it be a problem with the UPS?
Even when the tripplite_usb driver actually works correctly, it is
often attributable to a problem with the UPS :-)

All kidding aside, if this does not occur every time, it is going to
be somewhat hard to track down. One possibility is to run the driver
with some "-D" flags to generate debug output, but this will not work
under upsdrvctl - you would simply start the driver by hand, and you
will probably want to redirect the debug output to a log file.
> It has occurred on different
> machines with different UPS?s, so I don?t think it is a hardware issue. Has
> anyone else seen a problem like this? Or could point me in the right
> direction to get this problem resolved?
I will admit that I do not have a tripplite_usb driver running
continuously, and definitely not a protocol 3003 UPS, so we rely on
user reports.

-- 
- Charles Lepple