DDCutil Only detecting one out of three monitors

[cpebble]

I've previously used this to control brightness on my screens, where it correctly detected two monitors. A few months go by and i returned to a pet project using ddclib, and suddenly it only detects one out of three(i added one in the meantime). The two monitors are the same, the third is a new dell monitor.

I ran ddcutil interrogate Here: pastebin.

The monitors all have ddc/ci enabled, and are connected via two hdmi ports, and a single displayport cable, without daisy chaining. Any advice on how to troubleshoot this?

[rockowitz]

Looks like you've hit the bug in the Nvidia 465 driver that is discussed in issue #201. The problem is reported for both 465.24 and 465.27. I suggest you back out to the 460 driver.

[toshi2k2]

Reporting the same problem for 470.57 driver version as well. Only one monitor being detected out of two.

ddcutil interrogate output

[gjvc]

This seems to be also present using 470.103.01 too. Two out of three monitors detected.

[rockowitz]

I would also mention that the original post by @cpebble reports simultaneous use of what appears to be another DDC program ddclib (I am unfamiliar with it). In this case his problem may be due to conflict between dddcutil and the other program. These conflicts can often be resolved using ddcutil option --force-slave-address. Release 1.2.2 does a better job of diagnosing the conflicts, reporting monitors as Busy instead of Invalid. For details, see the Release Notes for ddcutil 1.2.2.