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...odem cable and running cu in 2 terminals. Type in one terminal, output shows in the other, and vice versa. I disconnect UPS from Ubuntu system, connect it to OpenBSD, try apcsmart driver, and in 15 seconds it comes back with a message "unable to detect an APC Smart protocol UPS on port /dev/cua01". NUT is installed from OpenBSD packages, version 2.7.1. APC Smart protocol driver 3.2 (2.7.1) I suspect there is something special with serial ports on d2500cc motherboard as I also tried, out of curiousity, apcupsd from OpenBSD ports, and it failed to detect the UPS either. I wonder if any...

...get dropped under load? Also, is that null-modem cable wired to test hardware handshaking? > I disconnect UPS from Ubuntu system, connect it to OpenBSD, try apcsmart > driver, and in 15 seconds it comes back with a message "unable to detect > an APC Smart protocol UPS on port /dev/cua01". NUT is installed from OpenBSD > packages, version 2.7.1. APC Smart protocol driver 3.2 (2.7.1) In the event we missed something with the new driver, can you try with apcsmart-old? I don't remember the details, but there were some changes related to how the modem control lines are se...

...ns on the adapter are connected, so it should support hardware handshake. > >> I disconnect UPS from Ubuntu system, connect it to OpenBSD, try apcsmart >> driver, and in 15 seconds it comes back with a message "unable to detect >> an APC Smart protocol UPS on port /dev/cua01". NUT is installed from OpenBSD >> packages, version 2.7.1. APC Smart protocol driver 3.2 (2.7.1) > > In the event we missed something with the new driver, can you try with apcsmart-old? Actually I tied that too, with the same level of luck, just forgot to mention that. > &g...