Surely this still works:
1. Open knowledge menu ('~a')
2. Scroll down to Lights
3. Open submenu with right-arrow or 6
4. Toggle squelch with 's'

Just verified in 4.1.3

This doesn't work in master. It works on other things but not lights.

Is there a specific reason not to allow ignoring objects that can have egos by tval? At some point a warrior has enough str/dex & a good enough weapon to be ignoring all the weapons below a certain base dice for instance.

I am impressed that this got broken. The knowledge menu should be robust to changes in types of object.

This was a deliberate change, but maybe requires some more thought.

The issue is that now torches and lanterns can potentially be ego-items or (if you're playing with randarts) artifacts. So ignoring all torches was ignoring artifacts sometimes.

I guess the thing to do is to bring lights back into the "ignore by type" menu but put a special case in to avoid ignoring artifacts - does that sound correct?

You may need to have to separate ignoring menus, one for torches one for lanterns. I think you need to be able to ignore average torches without ignoring average lanterns. Then all should work the same as the other categories. No Ignore, Bad, Average, Good, Non-Artifact. As well as the Ego ignore by types of ego lights.

Nick-
Using the knowledge menu for ignore has *always* killed possible artifacts. (Ignore daggers, and you won't find any *thancs.) I am perplexed why torches deserve special treatment.

As far as I'm aware, you can't ignore daggers - you can only ignore object kinds which appear somewhere in the main ignore menu (before the quality and ego menus).

you can't ignore artifacts. The highest level of ignore is everything except artifacts. (apart from an artifactless birth option, if I recall).

Yeah, I just noticed that too - which means I just fixed a bug that didn't exist. Will revert :)