[Nut-upsuser] [EXTERNAL] Re: Tripp Lite SMART1500LCD will not stay shut down when power is disconnected

David Zomaya David_Zomaya at tripplite.com
Tue Jan 14 18:30:39 GMT 2020

If you'd like, shoot me over your serial number and the corner-cases you don't have answers for and I can look into it.

Thank you,
David Zomaya
Tripp Lite
david_zomaya at tripplite.com

-----Original Message-----
From: Nut-upsuser <nut-upsuser-bounces+david_zomaya=tripplite.com at alioth-lists.debian.net> On Behalf Of Ken Olum
Sent: Tuesday, January 14, 2020 11:24 AM
To: Layne Fowler <layne.fowler at gmail.com>
Cc: nut-upsuser at alioth-lists.debian.net
Subject: [EXTERNAL] Re: [Nut-upsuser] Tripp Lite SMART1500LCD will not stay shut down when power is disconnected

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Hi, Layne.  Glad my changes helped.

It's not surprising that there are some remaining race conditions.  I'm afraid I can't remember whether I have this particular problem or not.
My variable settings shown by upsc are below.

I think the general plan should be to run the system on the UPS for as long as possible, then shut it down with the shortest delay possible that still allows for a clean shutdown of your system.  If these times are, say, 10 minutes and 10 seconds, then you only encounter the race if the power happens to be off for an interval between 0:10:00 and 0:10:10, which is quite unlikely.

Actually fixing all races would be better still, but I do not have a good enough understanding of how my UPS handles the various settings to be able to do that.


battery.charge: 100
battery.runtime: 4050
battery.type: PbAC
battery.voltage: 13.4
battery.voltage.nominal: 12.0
device.mfr: Tripp Lite
device.model: Tripp Lite UPS
device.type: ups
driver.name: usbhid-ups
driver.parameter.offdelay: 10
driver.parameter.ondelay: 50
driver.parameter.pollfreq: 30
driver.parameter.pollinterval: 2
driver.parameter.port: auto
driver.parameter.synchronous: no
driver.version: 2.7.4-476-g6b9971a7
driver.version.data: TrippLite HID 0.82
driver.version.internal: 0.42
input.frequency: 60.0
input.voltage: 118.2
input.voltage.nominal: 120
output.frequency.nominal: 60
output.voltage.nominal: 120
ups.beeper.status: disabled
ups.delay.shutdown: 10
ups.mfr: Tripp Lite
ups.model: Tripp Lite UPS
ups.power.nominal: 450
ups.productid: 2010
ups.status: OL
ups.timer.reboot: 65535
ups.timer.shutdown: 65535
ups.vendorid: 09ae
ups.watchdog.status: 0

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