Addition to PR https://github.com/systemd/systemd/pull/41181
Plasma-workspace OSD notifications about turning the touchpad on
and off are guided by f21. When this match is specified,
KDE notifies on this laptop that the on/off switch of the atchpad
state is pressed.
Fix dmesg:
atkbd serio0: Unknown key pressed (translated set 2, code 0xc1 on isa0060/serio0).
# Wareus B15 (8AD5A)
evdev:atkbd:dmi:bvn*:bvr*:bd*:svnWareus*:pnB15*:*
KEYBOARD_KEY_55=fn
+ KEYBOARD_KEY_c1=f21
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# WeiHeng