Not a whole lot to do in the field for a legitimate USB not responding issue other than verify cabling and give a power cycle and/or discharge reset a try (which, given the nature of a UPS isn't always something you can easily do of course).
If it looks like a problem with USB being completely dead, as opposed to just the "drops" issue we started with, I definitely recommend contacting support. From: Kirk Bocek <[email protected]> Sent: Thursday, September 24, 2020 11:53 AM To: David Zomaya; Stuart D. Gathman Cc: [email protected] Subject: Re: [EXTERNAL] Re: [Nut-upsuser] UPS Losing Connection On 9/24/2020 9:05 AM, David Zomaya wrote: > Update from my end: > > I found the old thread where I posted a possible resolution for a similar > issue on CentOS 7.6 with the same protocol (2012): > > https://urldefense.proofpoint.com/v2/url?u=https-3A__alioth-2Dlists.debian.net_pipermail_nut-2Dupsuser_2019-2DJune_011451.html&d=DwICaQ&c=f9s1WCuF-N6cmD_YaZ7gBg&r=lhr3k4au5dVQgHY_iS-v_t9g8PHVkn8Px_wyaupZGfQ&m=Mk4enQyHH_ktS46pXqu47MyyIUG2duzJx8eyvQjcoBU&s=f0uW9O7ZL0GsIVuqpXTyQTMTcwD5FGa7rntSNtErR8c&e= > > https://urldefense.proofpoint.com/v2/url?u=https-3A__alioth-2Dlists.debian.net_pipermail_nut-2Dupsdev_2019-2DJune_007440.html&d=DwICaQ&c=f9s1WCuF-N6cmD_YaZ7gBg&r=lhr3k4au5dVQgHY_iS-v_t9g8PHVkn8Px_wyaupZGfQ&m=Mk4enQyHH_ktS46pXqu47MyyIUG2duzJx8eyvQjcoBU&s=CL5p7NIqJwtlfJZeV359EdkXz73uEaSfWAizbSGHc1k&e= > > Some of my initial steps were probably unnecessary, but through a combination > of configuration tweaks and udev rules, the drops seemed to go away. > > Of course, if the USB port is not responding at all, that is a separate issue > (is there another computer/cable to verify that with?). You should contact > tech support if that ends up being the case: > https://www.tripplite.com/support/help > > (I'm no longer on the tech support team so I couldn't help directly with an > RMA if needed) > > > Thank you, > David Zomaya > Tripp Lite > I plugged the USB into another host and nothing. Not in lsusb output. No hotplug messages in the ring buffer. So is this a busted unit? Is there anyway to reset the USB on the UPC without power cycling everything attached to it? ________________________________ 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. _______________________________________________ Nut-upsuser mailing list [email protected] https://alioth-lists.debian.net/cgi-bin/mailman/listinfo/nut-upsuser
