[Nut-upsuser] Tripp Lite "Remote Shutdown" when USB cable is attached

Adam Talbot ajtalbot1 at gmail.com
Mon Feb 1 21:39:58 GMT 2021

I am kinda stuck on this one.  Whenever I attach (USB to a linux box) my
TrippLite UPS, it "REMOTE SHUTDOWN".  This is a new problem that has
cropped up in the last 6 months.  At first I thought it was a NUT
configuration issue, but now I believe this to be some kind of kernel bug?
When I plug in the UPS, I can see the system logs show the UPS, then
everything powers off.

UPS LCD shows the below error when I plug in the USB cable:

I tested this against 2 different X86 boxes and a Raspberry Pi. All cause
the same result in the UPS.  Only one box (nas) has NUT installed and

UPS is a Tripp Lite SU3000RTXLCD2U.

I am totally stumped on this one.  Below is a dump of basically all my
specs.  Any ideas?

root at nas:~# uname -a
Linux nas 5.4.78-2-pve #1 SMP PVE 5.4.78-2 (Thu, 03 Dec 2020 14:26:17
+0100) x86_64 GNU/Linux
root at nas:~# cat /etc/nut/nut.conf
root at nas:~# cat /etc/nut/ups.conf
root at nas:~# cat /etc/nut/upsd.conf
root at nas:~# cat /etc/nut/upsmon.conf
root at nas:~# cat /etc/nut/upssched.conf
root at nas:~#
root at nas:~# cat /etc/debian_version

Before all this broke, I was able to monitor the UPS and get the following
battery.charge: 100
battery.charge.low: 20
battery.charge.warning: 20
battery.runtime: 6662
battery.temperature: 29.9
battery.type: PbAc
battery.voltage: 81.0
battery.voltage.nominal: 72.0
device.mfr: TRIPPLITE
device.model: TRIPPLITE UPS
device.serial: XXXXXXXXXXXXXX
device.type: ups
driver.name: usbhid-ups
driver.parameter.pollfreq: 30
driver.parameter.pollinterval: 2
driver.parameter.port: auto
driver.parameter.synchronous: no
driver.version: 2.7.4
driver.version.data: TrippLite HID 0.82
driver.version.internal: 0.41
input.frequency: 60.0
input.transfer.high: 150.0
input.transfer.high.max: 150
input.transfer.high.min: 145
input.transfer.low: 55.0
input.transfer.low.max: 60
input.transfer.low.min: 55
input.voltage: 123.0
input.voltage.nominal: 120
output.current: 1.9
output.frequency: 60.0
output.frequency.nominal: 60
output.voltage: 120.0
output.voltage.nominal: 120
ups.beeper.status: enabled
ups.delay.shutdown: 20
ups.delay.start: 30
ups.firmware: 64
ups.load: 8
ups.mfr: TRIPPLITE
ups.model: TRIPPLITE UPS
ups.power: 226.0
ups.power.nominal: 3000
ups.productid: 4004
ups.serial: 2620ELCPS87A200020
ups.status: OL
ups.test.result: Done and passed
ups.timer.reboot: 0
ups.timer.shutdown: -1
ups.timer.start: 0
ups.vendorid: 09ae
ups.watchdog.status: 0

root at nas:/var/log# zcat messages.*.gz | grep -i tripp
Jan 15 11:05:05 nas kernel: [    1.571857] usb 3-1: Product: TRIPPLITE UPS
Jan 15 11:05:05 nas kernel: [    1.571858] usb 3-1: Manufacturer: TRIPPLITE
Jan 15 11:05:05 nas kernel: [    1.629210] hid-generic 0003:09AE:4004.0001:
hiddev0,hidraw0: USB HID v1.11 Device [TRIPPLITE        TRIPPLITE UPS   ]
on usb-0000:2e:00.3-1/input0
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