Greetings, I am writing to consult about an issue I've encountered over the past few days - One which I've come to understand possibly stems from a flaw within the way NUT implements its instant commands via SNMP.
I will preface this by saying that my configuration is using hardware that is not officially supported ( It's a Makelsan-branded UPS, of the 'Powerpack-SE' Series with an external 'iStars mini' SNMP card. ), but I believe this issue is common to all hardware that abides by RFC-1628 controlled using the snmp-ups driver. My reasoning for this is SNMP packet inspection of NUT's output, compared to that of an 'iStars' proprietary control software, which actually succeeds in getting the hardware to react as expected: [NUT upscmd, starting a self-test. Fails to start the self-test.] variable-bindings: 1.3.6.1.2.1.33.1.7.1.0: 0 [iStars proprietary control program, starting self-test. Starts the self-test.] variable-bindings: 1.3.6.1.2.1.33.1.7.1.0: 1.3.6.1.2.1.33.1.7.7.4 According to some MIB descriptions<https://circitor.fr/Mibs/Html/UPS-MIB.php> I found online, the NUT implementation only sends a 'header' object identifier that prefaces all ups tests, while the proprietary method also includes the specific type of test to perform. I believe this is because the 'upscmd' program is unable to pass values to it's commands that include non-alphanumerical symbols, like periods, as attempting to manually pass a value like '1.3.6.1.2.1.33.1.7.7.4' to the self-test command always fails. All of this stems from my speculation. I'm not well-accustomed to this toolkit to create a bug report in full confidence. Any help with this matter is much appreciated, and if this issue is still somehow isolated to only this unsupported manufacturer, I apologize for any confusion. Kind regards, P. ________________________________ From: Nut-upsuser <[email protected]> on behalf of [email protected] <[email protected]> Sent: Tuesday, May 19, 2026 8:50 AM To: Albert Pavlas <[email protected]> Subject: Welcome to the "Nut-upsuser" mailing list (Digest mode) [You don't often get email from [email protected]. Learn why this is important at https://aka.ms/LearnAboutSenderIdentification ] Welcome to the [email protected] mailing list! To post to this list, send your message to: [email protected] General information about the mailing list is at: https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Falioth-lists.debian.net%2Fcgi-bin%2Fmailman%2Flistinfo%2Fnut-upsuser&data=05%7C02%7Calbert.pavlas%40k-net.cz%7C58766fb08c8b40726b7508deb572ef74%7C529b1a46fbc54bc98fac47d64077baa4%7C0%7C0%7C639147702422872849%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=fWE0REETKZwuJfGWXflDzzqYQmqn8yId7qQMD8ELu4g%3D&reserved=0<https://alioth-lists.debian.net/cgi-bin/mailman/listinfo/nut-upsuser> If you ever want to unsubscribe or change your options (eg, switch to or from digest mode, change your password, etc.), visit your subscription page at: https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Falioth-lists.debian.net%2Fcgi-bin%2Fmailman%2Foptions%2Fnut-upsuser%2Fpavlas%2540k-net.cz&data=05%7C02%7Calbert.pavlas%40k-net.cz%7C58766fb08c8b40726b7508deb572ef74%7C529b1a46fbc54bc98fac47d64077baa4%7C0%7C0%7C639147702422898905%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=QwlYlrumADg1PqNC%2B6Y%2BFiGeGRAAm2O%2B%2FT%2F%2B36QHJPc%3D&reserved=0<https://alioth-lists.debian.net/cgi-bin/mailman/options/nut-upsuser/pavlas%40k-net.cz> You can also make such adjustments via email by sending a message to: [email protected] with the word `help' in the subject or body (don't include the quotes), and you will get back a message with instructions. You must know your password to change your options (including changing the password, itself) or to unsubscribe without confirmation. It is: P9Tw9mdj?V:9@)9 Normally, Mailman will remind you of your alioth-lists.debian.net mailing list passwords once every month, although you can disable this if you prefer. This reminder will also include instructions on how to unsubscribe or change your account options. There is also a button on your options page that will email your current password to you.
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