Logitech EX110 keyboard/mouse not working, detected as Logitech LX710, after upgrade

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
25/100
Issue type
Bug
Clarity
Needs clarification
Activity status
Stale
Tech stack
c, linux
Domain
embedded-iot, operating-systems

Research direction

Start with the reported lsusb and dmesg output, then inspect the kernel's logitech-djreceiver handling for USB ID 046d:c517. Done means an EX110 receiver is distinguished from the LX710 and uses a compatible handler after the kernel upgrade.

Written by the indexing model from the issue text.

Description

Describe the bug
Prior to upgrade to 5.4.51-v7, Logitech model EX110 wireless keyboard/mouse worked OK;
after upgrade, the keyboard/mouse are incorrectly recognized as "Logitech, Inc. LX710 Cordless Desktop Laser".

To reproduce
Plug in USB wireless Logitech model EX110 keyboard/mouse; verify incorrect recognition with lsusb

Expected behaviour
Add a clear and concise description of what you expected to happen.

Actual behaviour
Add a clear and concise description of what actually happened.

System
Copy and paste the results of the raspinfo command in to this section. Alternatively, copy and paste a pastebin link, or add answers to the following questions:

  • Which model of Raspberry Pi?
    Raspberry Pi 3 Model B Rev 1.2

  • Which OS and version (cat /etc/rpi-issue)?
    Raspberry Pi reference 2019-07-10
    Generated using pi-gen, https://github.com/RPi-Distro/pi-gen, 175dfb027ffabd4b8d5080097af0e51ed9a4a56c, stage5

  • Which firmware version (vcgencmd version)?
    version 21a15cb094f41c7506ad65d2cb9b29c550693057 (clean) (release) (start)

  • Which kernel version (uname -a)?
    Linux raspberrypi3 5.4.51-v7+ #1327 SMP Thu Jul 23 10:58:46 BST 2020 armv7l GNU/Linux

Logs
lsusb:
Bus 001 Device 005: ID 046d:c517 Logitech, Inc. LX710 Cordless Desktop Laser
Note that vendor/product code 046d:c517 is the same for EX110 and LX710 devices;
however the handler/drivers are not compatible.

dmesg:
[ 7.388095] logitech-djreceiver 0003:046D:C517.0001: hidraw0: USB HID v1.10 Keyboard [Logitech USB Receiver] on usb-3f980000.usb-1.4.1/input0
[ 7.640911] logitech-djreceiver 0003:046D:C517.0002: hiddev96,hidraw1: USB HID v1.10 Mouse [Logitech USB Receiver] on usb-3f980000.usb-1.4.1/input1

Additional context
Same problem occurred after upgrading kali on different hardware.

Dominant language
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