{"id":2763,"date":"2026-07-10T09:01:12","date_gmt":"2026-07-10T07:01:12","guid":{"rendered":"https:\/\/clark.tipistrani.it\/?p=2763"},"modified":"2026-07-10T09:01:12","modified_gmt":"2026-07-10T07:01:12","slug":"messaggi-di-warning-causati-da-apcupsd","status":"publish","type":"post","link":"https:\/\/clark.tipistrani.it\/?p=2763","title":{"rendered":"Messaggi di warning causati da apcupsd"},"content":{"rendered":"

Mi sono trovato con una sequela praticamente infinita di pessaggi di questo tipo nel syslog:<\/p>\n

2026-07-10T04:02:07.439726+02:00 aliseo kernel: [542013.839213] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2)\r\n2026-07-10T04:02:19.408209+02:00 aliseo kernel: [542025.807111] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2)\r\n2026-07-10T04:02:31.376721+02:00 aliseo kernel: [542037.775111] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2)\r\n2026-07-10T04:02:43.409396+02:00 aliseo kernel: [542049.807217] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2)\r\n2026-07-10T04:02:55.377961+02:00 aliseo kernel: [542061.775223] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2)\r\n2026-07-10T04:03:07.410512+02:00 aliseo kernel: [542073.807216] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2)\r\n2026-07-10T04:03:19.443073+02:00 aliseo kernel: [542085.839217] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2)\r\n2026-07-10T04:03:31.347648+02:00 aliseo kernel: [542097.743237] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2)\r\n2026-07-10T04:03:43.508197+02:00 aliseo kernel: [542109.903220] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2)\r\n2026-07-10T04:03:55.412751+02:00 aliseo kernel: [542121.807219] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2)\r\n2026-07-10T04:04:07.445361+02:00 aliseo kernel: [542133.839275] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2)\r\n2026-07-10T04:04:19.413857+02:00 aliseo kernel: [542145.807216] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2)\r\n2026-07-10T04:04:31.446448+02:00 aliseo kernel: [542157.839234] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2)\r\n2026-07-10T04:04:43.414985+02:00 aliseo kernel: [542169.807217] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2)\r\n2026-07-10T04:04:55.511573+02:00 aliseo kernel: [542181.903234] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2)\r\n2026-07-10T04:05:07.416105+02:00 aliseo kernel: [542193.807220] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2)\r\n2026-07-10T04:05:19.384663+02:00 aliseo kernel: [542205.775219] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2)\r\n2026-07-10T04:05:31.865240+02:00 aliseo kernel: [542218.255208] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2)\r\n2026-07-10T04:05:43.385664+02:00 aliseo kernel: [542229.775102] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2)\r\n2026-07-10T04:05:55.354346+02:00 aliseo kernel: [542241.743224] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2)\r\n2026-07-10T04:06:07.450928+02:00 aliseo kernel: [542253.839242] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2)<\/pre>\n
Una rapida ricerca in Internet mi ha portato a trovare:
\nQuesto errore si verifica perch\u00e9 il driver USB HID del kernel Linux riceve pacchetti di dati di lunghezza inattesa da un UPS American Power Conversion (APC).<\/span><\/span> Il driver HID si aspetta un certo numero di byte (ad esempio, 3), ma l’UPS invia solo pacchetti pi\u00f9 corti (ad esempio, 2), generando una serie di avvisi nei log del kernel.<\/span><\/span><\/span>
\nInnocuo ma decisamente fastidioso…
\nSoluzione:
\nsilenziare gli avvisi del kernel passando un parametro al modulo usbhid.
\n Passaggio 1: Creare un file di configurazione per Modprobe
\nCreare un nuovo file di configurazione per il modulo USB HID utilizzando l’editor preferito:vim \/etc\/modprobe.d\/usbhid.conf
\n<\/span><\/span>Passaggio 2: Aggiungere il parametro Quirk
\nAggiungere la seguente riga al file.<\/span><\/span> Questo comando indica al driver USB HID del kernel di applicare un “quirk” (ignora o gestisce specifici limiti di segnalazione) per l’ID fornitore APC (051D) e l’ID prodotto (0002)
\noptions usbhid quirks=0x051D:0x0002:0x0004
\n(Nota: 0x0004 rappresenta HID_QUIRK_BAD_INPUT_BYTES, che indica al kernel di accettare pacchetti corti senza generare un errore)
\n<\/span><\/span> Passaggio 3: Aggiornare l’Initramfs e riavviare
\nPoich\u00e9 il modulo usbhid viene spesso caricato all’inizio del ciclo di avvio, \u00e8 necessario aggiornare le immagini dell’Initramfs affinch\u00e9 la modifica abbia effetto: update-initramfs -u -k all
\nchkboot (se installato per evitare warning alle succesive login)
\n<\/span><\/span><\/span>reboot
\ne il fastidio \u00e8 risolto.<\/span><\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"
Mi sono trovato con una sequela praticamente infinita di pessaggi di questo tipo nel syslog: 2026-07-10T04:02:07.439726+02:00 aliseo kernel: [542013.839213] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2) 2026-07-10T04:02:19.408209+02:00 aliseo kernel: [542025.807111] hid-generic 0003:051D:0002.0001: Event data for report 8 was too short (3 vs 2) 2026-07-10T04:02:31.376721+02:00 aliseo kernel: [542037.775111] hid-generic 0003:051D:0002.0001: […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,224,7],"tags":[72,226],"class_list":["post-2763","post","type-post","status-publish","format-standard","hentry","category-linux","category-logging","category-sistemi-operativi","tag-apcupsd","tag-syslog"],"_links":{"self":[{"href":"https:\/\/clark.tipistrani.it\/index.php?rest_route=\/wp\/v2\/posts\/2763","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/clark.tipistrani.it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/clark.tipistrani.it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/clark.tipistrani.it\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/clark.tipistrani.it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2763"}],"version-history":[{"count":1,"href":"https:\/\/clark.tipistrani.it\/index.php?rest_route=\/wp\/v2\/posts\/2763\/revisions"}],"predecessor-version":[{"id":2764,"href":"https:\/\/clark.tipistrani.it\/index.php?rest_route=\/wp\/v2\/posts\/2763\/revisions\/2764"}],"wp:attachment":[{"href":"https:\/\/clark.tipistrani.it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2763"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/clark.tipistrani.it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2763"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/clark.tipistrani.it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2763"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}