[SOLVED] Delete key doesn't work in some places

[chconnor]

UPDATE: Found this relatively insane old bug and that seems to be what the issue was. (Had to re-enable "Del" checkbox for the Settings->Shortcuts->Shortcuts->File->Move to Trash entry, and then restart, or at least logout/login, to have it take effect.) I'll post this anyway because more info about this crazy bug seems valuable.

UPDATE2: you can go into dolphin->menu->configure->configure keyboard shortcuts, scroll down to Move to Trash and select it, and change from "Default: Del" to "Custom:" but leave it at "None" and it has the desired effect, and does not trigger the bug.

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I think this predated 24.04, but not 100% sure. At any rate, it persists:

The delete key has stopped working for me in some cases.

Places it does not work (nothing happens):

- krunner
- dolphin
- keepassxc
- the search field in the system settings
- the search field when I hit the meta key and the KDE menu pops up

Places where it does work:

- firefox
- thunderbird
- libreoffice
- konsole
- if I run "sudo xev -event keyboard" I see the key press and release

Other notes:

- shift-delete works in Dolphin, even though delete by itself does not.

xev results when pressing and releasing:

KeyPress event, serial 28, synthetic NO, window 0x4600001,
root 0x1d3, subw 0x0, time 35597724, (817,277), root:(2272,1552),
state 0x10, keycode 119 (keysym 0xffff, Delete), same_screen YES,
XLookupString gives 1 bytes: (7f) ""
XmbLookupString gives 1 bytes: (7f) ""
XFilterEvent returns: False

KeyRelease event, serial 28, synthetic NO, window 0x4600001,
root 0x1d3, subw 0x0, time 35597772, (817,277), root:(2272,1552),
state 0x10, keycode 119 (keysym 0xffff, Delete), same_screen YES,
XLookupString gives 1 bytes: (7f) ""
XFilterEvent returns: False

This:

cat ~/.config/khotkeysrc | grep Key=

...does not reveal anything accidentally mapped to the delete key. Is there somewhere else that might be intercepting?

Per this answer, I tried:

KEY=Delete; xdotool keydown ${KEY}; xdotool key XF86LogGrabInfo; xdotool keyup ${KEY}

...but it showed no "active grabs" for the keypress.