@ddstreet : Will do.  Before commenting out

# Microsoft Natural Ergonomic Keyboard 4000
evdev:input:b0003v045Ep00DB*
 KEYBOARD_KEY_c022d=up                                  # zoomin
 KEYBOARD_KEY_c022e=down 

from /lib/udev/hwdb.d/60-keyboard.hwdb , the output of `sudo evtest` is
this:

No device specified, trying to scan all of /dev/input/event*
Available devices:
/dev/input/event0:      Lid Switch
/dev/input/event1:      Power Button
/dev/input/event2:      Sleep Button
/dev/input/event3:      Power Button
/dev/input/event4:      AT Translated Set 2 keyboard
/dev/input/event5:      USB Optical Mouse
/dev/input/event6:      AlpsPS/2 ALPS DualPoint Stick
/dev/input/event7:      AlpsPS/2 ALPS DualPoint TouchPad
/dev/input/event8:      Microsoft NaturalĀ® Ergonomic Keyboard 4000
/dev/input/event9:      Microsoft NaturalĀ® Ergonomic Keyboard 4000
/dev/input/event10:     ST LIS3LV02DL Accelerometer
/dev/input/event11:     HDA Intel PCH Dock Mic
/dev/input/event12:     HDA Intel PCH Dock Line Out
/dev/input/event13:     HDA Intel PCH Front Headphone
/dev/input/event14:     Laptop_Integrated_Webcam_HD: In
/dev/input/event15:     Dell WMI hotkeys
/dev/input/event16:     Video Bus
/dev/input/event17:     Video Bus
/dev/input/event18:     HDA Intel HDMI HDMI/DP,pcm=3
/dev/input/event19:     HDA Intel HDMI HDMI/DP,pcm=7
/dev/input/event20:     HDA Intel HDMI HDMI/DP,pcm=8
/dev/input/event21:     HDA Intel HDMI HDMI/DP,pcm=9
/dev/input/event22:     HDA Intel HDMI HDMI/DP,pcm=10
Select the device event number [0-22]:

1) What would I choose after editing the file and rebooting? 8 or 9 or
something else?

2) How are they Zoom keys supposed to work under Linux?  The up/down
slider scrolls for me so far. Does a combination of modifier keys (Alt,
Shift,  Ctrl, AltGr) have to be pressed?  Should the Fn key light be on
or off?

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https://bugs.launchpad.net/bugs/1890186

Title:
  Failed to call EVIOCSKEYCODE with scan code 0xc022d, and key code 103:
  Invalid argument

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