[Nut-upsuser] [EXTERNAL] Re: Tripp Lite SMART1500LCD repeatedly disconnecting and reconnecting

Layne Fowler layne.fowler at gmail.com
Wed Dec 11 15:35:32 GMT 2019

Thought I'd follow up in case someone else runs into this issue. In the end
what worked for me was tweaking the udev rules. I have had no USB
disconnects or stale data warnings so far. I only used one rule for my UPS:

# /etc/udev/rules.d/62-nut-usbups.rules

SUBSYSTEM!="usb", GOTO="nut-usbups_rules_end"

# TrippLite
#  e.g. TrippLite SMART1500LCD - usbhid-ups
ACTION=="add|change", SUBSYSTEM=="usb|usb_device",
SUBSYSTEMS=="usb|usb_device", ATTR{idVendor}=="09ae",
ATTR{idProduct}=="2012", MODE="664", GROUP="nut", RUN+="/sbin/upsdrvctl
stop; /sbin/upsdrvctl start"


My ups.conf:

# /etc/nut/ups.conf

pollinterval = 1

driver = usbhid-ups
port = auto
desc = "Tripp Lite SMART1500LCD"
vendorid = 09ae
productid = 2012

And I also removed MTP as it was trying to take the device.

sudo apt-get remove --auto-remove libmtp-common

On Mon, Dec 9, 2019 at 10:04 PM Layne Fowler <layne.fowler at gmail.com> wrote:

> Charles, thank you for that link to David's earlier message. I tried
> adding those udev rules and changing the pollinterval. I need to do some
> tinkering but I don't think the part RUN+="/sbin/upsdrvctl stop;
> /sbin/upsdrvctl start" is working right. If I manually run the commands
> then the USB disconnects stop and there are no kernel messages. Running
> "sudo /lib/nut/usbhid-ups -DD -a ups" also looks clean to me. I'll be sure
> to update if I figure out how to get it fully working. Thanks!
> On Sun, Dec 8, 2019 at 11:18 PM David Zomaya <David_Zomaya at tripplite.com>
> wrote:
>> I haven't tried it on RaspberryPi, but if there's some specific Tripp
>> Lite information I can help with, let me know.
>> David Zomaya
>> Tripp Lite
>> ------------------------------
>> *From:* Nut-upsuser <nut-upsuser-bounces+david_zomaya=
>> tripplite.com at alioth-lists.debian.net> on behalf of Charles Lepple <
>> clepple at gmail.com>
>> *Sent:* Sunday, December 8, 2019 8:36 PM
>> *To:* Layne Fowler
>> *Cc:* nut-upsuser
>> *Subject:* [EXTERNAL] Re: [Nut-upsuser] Tripp Lite SMART1500LCD
>> repeatedly disconnecting and reconnecting
>> This is an *EXTERNAL* email. Please take a moment and think before
>> clicking any links or opening any attachments from this email. If
>> suspicious, please forward to ishelpdesk at tripplite.com for review.
>> ------------------------------
>> On Dec 8, 2019, at 5:46 PM, Layne Fowler <layne.fowler at gmail.com> wrote:
>> My UPS is connected to a Raspberry Pi by USB. After a few hours of
>> working, the service fails. Looking at kernel messages I noticed that the
>> device is repeatedly disconnecting and reconnecting.
>> I have tried using a different USB port and using a brand new USB cable.
>> I have not had success by changing config parameters like
>> pollfreq/pollinterval/etc.
>> What is causing the UPS to keep disconnecting?
>> Not sure (it's a protocol issue lower than NUT), but does this post from
>> Tripp Lite help the UPS automatically reconnect?
>> https://alioth-lists.debian.net/pipermail/nut-upsuser/2019-June/011451.html
>> <https://urldefense.proofpoint.com/v2/url?u=https-3A__alioth-2Dlists.debian.net_pipermail_nut-2Dupsuser_2019-2DJune_011451.html&d=DwMFAg&c=f9s1WCuF-N6cmD_YaZ7gBg&r=lhr3k4au5dVQgHY_iS-v_t9g8PHVkn8Px_wyaupZGfQ&m=5bTj0FByjuC7ZwvwC7XsgqsH_kXRehDbkaYVEGxZrkQ&s=-Pz1JlSeu5vl0n4bXiBIaPW1nFRDro_yq3QvTTbwC5o&e=>
>> (you may need to do some RedHat-to-Debian translation for some of the
>> pathnames.)
>> OS - Raspbian GNU/Linux 10 (buster)
>> Kernel - 4.19.75-v7+
>> Nut version - 2.7.4-8
>> Installation method - From package
>> UPS - Tripp Lite SMART1500LCD
>> Thanks for including all of the version information.
>> ------------------------------
>> This message is for the addressee's use only. It may contain confidential
>> information. If you receive this message in error, please delete it and
>> notify the sender. Tripp Lite disclaims all warranties and liabilities, and
>> assumes no responsibility for viruses which may infect an email sent to you
>> from Tripp Lite and which damage your electronic systems or information. It
>> is your responsibility to maintain virus detection systems to prevent
>> damage to your electronic systems and information.
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