sys-power/acpid produces log spam

Since many months, sys-power/acpid produces a lot of syslog entries when using arrow keys. In /var/log/messages :

[…]
Oct 8 11:15:25 coreI5 root: ACPI event unhandled: button/up UP 00000080 00000000 K
Oct 8 11:15:27 coreI5 root: ACPI event unhandled: button/down DOWN 00000080 00000000 K
Oct 8 11:17:37 coreI5 root: ACPI event unhandled: button/kpenter KPENTER 00000080 00000000 K
[…]

Workaround

$ cat /etc/acpi/events/buttons
# spam in logs : « root: ACPI event unhandled: [...] »
event=button/(up|down|left|right|kpenter)
action=<drop>
  1. https://forums.gentoo.org/viewtopic-t-1159391.html
  2. https://wiki.archlinux.org/title/acpid#Disabling_ordinary_key_events