I use arch, with keyboard layout “es”, because I’m Spanish. My keyboard doesn’t recognize the key “Insert”, unless Fn is enabled, and I don’t know why. I found its keycode in xmodmap -kpe: keycode 118 = Insert NoSymbol Insert NoSymbol Insert.
Since Fn takes the 7th place, I thought about changing it to keycode 118 = Insert NoSymbol Insert NoSymbol Insert NoSymbol Insert, but nothing changed.
It is strange since changing it to keycode 118 = slash NoSymbol Insert NoSymbol Insert, will only work when Fn is enabled as well, meaning that Fn+Insert = /.
Probably unimportant: There’s also a keycode  90 = KP_Insert KP_0 KP_Insert KP_0 KP_Insert KP_0, but I don’t know what key is. Using xev and pressing Insert with Fn enabled says it’s key 118, so it shouldn’t be an issue.
- What happens if you install keyd, run the monitor with - keyd - m, then press the key. Do you get an response?
- KP_Insert is the 0 key on the number pad. Since you mention an Fn key, I’m guessing you either have a slim keyboard or a laptop of some sort. That means wouldn’t have a number pad or its 0 key. At least not without it being enabled through, well, the Fn key or something like that, if some keys do double duty. - Curiously, upon checking my own system, the Insert keycode seems to be 110 not 118, but this might vary from keyboard to keyboard and system to system. Might be worth double-checking your own system anyway. - 118 is associated with KP_MinPlus for me, whatever that is. Pretty sure whatever keypad key that is, I don’t have one. (It’s not KP_Plus or KP_Minus, which are what you probably think they are. There’s also a KP_Comma entry, and I definitely don’t have a comma on my keypad. Perhaps some other keyboards do, what with it being the decimal separator in some countries.) - Edit: Everything I said here was wrong. - In it’s stead have a really bad poem. - Roses are red, 
 My chair is blue and white stripey,
 There’s not really a rhyming scheme,
 And stuff.- The KP_ prefix means it ought to be part of the number pad (literally Key Pad), not the regular keyboard. If there is a keyboard with such a key, I didn’t turn it up with a quick Internet search. (In fact a search now turns up my mention of it in this thread via a Lemmy instance. There can’t be much information about it out there if even Google is reduced to linking my comments(!)) - By comparison, there’s apparently a rare Brazilian number pad layout that has a dedicated comma key, which is almost certain to be KP_Comma. - I did see a couple of layouts that put a copy of the +/= key on the keypad instead of the regular +. Maybe that’s what ends up with the MinPlus key code despite the name being “wrong”. - Key pad…ffs…of course! I’m literally facepalming right now. I had thought Key press. That’s what I get for working a long day with little sleep, then drinking several beers and thinking I should comment on things I don’t know much about. 
 
- That would be the -/_ key, or the =/+ key. There’s no +/- key. - As with my response to @palordrolap, I woke up at 4am, having gone to bed at just past midnight, and had several beers after a tough shift, then assumed (obviously incorrectly) that I knew what I was talking about. Sorry for my error. 
 
 
 




