Comment 3 for bug 1890186

@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 Natural® Ergonomic Keyboard 4000
/dev/input/event9: Microsoft Natural® 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?