Jomaa ZX-K26 backlight wireless keyboard and mouse combo's logs during connecting to Linux Mint 21.2:
==> /var/log/kern.log <==
Apr 8 22:24:13 greenway kernel: [ 6719.709951] usb 3-2: new full-speed USB device number 4 using xhci_hcd
Apr 8 22:24:13 greenway kernel: [ 6719.865444] usb 3-2: New USB device found, idVendor=3554, idProduct=fc03, bcdDevice= 7.90
Apr 8 22:24:13 greenway kernel: [ 6719.865457] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Apr 8 22:24:13 greenway kernel: [ 6719.865462] usb 3-2: Product: 2.4G Receiver
Apr 8 22:24:13 greenway kernel: [ 6719.865466] usb 3-2: Manufacturer: CX
Apr 8 22:24:13 greenway kernel: [ 6719.869885] input: CX 2.4G Receiver as /devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.0/0003:3554:FC03.0003/input/input25
Apr 8 22:24:13 greenway kernel: [ 6719.930896] hid-generic 0003:3554:FC03.0003: input,hidraw0: USB HID v1.10 Keyboard [CX 2.4G Receiver] on usb-0000:00:14.0-2/input0
Apr 8 22:24:13 greenway kernel: [ 6719.934272] input: CX 2.4G Receiver Mouse as /devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.1/0003:3554:FC03.0004/input/input26
Apr 8 22:24:13 greenway kernel: [ 6719.934767] input: CX 2.4G Receiver as /devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.1/0003:3554:FC03.0004/input/input27
Apr 8 22:24:13 greenway kernel: [ 6719.935084] input: CX 2.4G Receiver Consumer Control as /devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.1/0003:3554:FC03.0004/input/input28
Apr 8 22:24:13 greenway kernel: [ 6719.994650] input: CX 2.4G Receiver System Control as /devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.1/0003:3554:FC03.0004/input/input29
Apr 8 22:24:13 greenway kernel: [ 6719.995787] hid-generic 0003:3554:FC03.0004: input,hiddev0,hidraw1: USB HID v1.10 Mouse [CX 2.4G Receiver] on usb-0000:00:14.0-2/input1
==> /var/log/syslog <==
Apr 8 22:24:13 greenway kernel: [ 6719.709951] usb 3-2: new full-speed USB device number 4 using xhci_hcd
Apr 8 22:24:13 greenway kernel: [ 6719.865444] usb 3-2: New USB device found, idVendor=3554, idProduct=fc03, bcdDevice= 7.90
Apr 8 22:24:13 greenway kernel: [ 6719.865457] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Apr 8 22:24:13 greenway kernel: [ 6719.865462] usb 3-2: Product: 2.4G Receiver
Apr 8 22:24:13 greenway kernel: [ 6719.865466] usb 3-2: Manufacturer: CX
Apr 8 22:24:13 greenway kernel: [ 6719.869885] input: CX 2.4G Receiver as /devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.0/0003:3554:FC03.0003/input/input25
Apr 8 22:24:13 greenway kernel: [ 6719.930896] hid-generic 0003:3554:FC03.0003: input,hidraw0: USB HID v1.10 Keyboard [CX 2.4G Receiver] on usb-0000:00:14.0-2/input0
Apr 8 22:24:13 greenway kernel: [ 6719.934272] input: CX 2.4G Receiver Mouse as /devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.1/0003:3554:FC03.0004/input/input26
Apr 8 22:24:13 greenway kernel: [ 6719.934767] input: CX 2.4G Receiver as /devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.1/0003:3554:FC03.0004/input/input27
Apr 8 22:24:13 greenway kernel: [ 6719.935084] input: CX 2.4G Receiver Consumer Control as /devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.1/0003:3554:FC03.0004/input/input28
Apr 8 22:24:13 greenway kernel: [ 6719.994650] input: CX 2.4G Receiver System Control as /devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.1/0003:3554:FC03.0004/input/input29
Apr 8 22:24:13 greenway kernel: [ 6719.995787] hid-generic 0003:3554:FC03.0004: input,hiddev0,hidraw1: USB HID v1.10 Mouse [CX 2.4G Receiver] on usb-0000:00:14.0-2/input1
Apr 8 22:24:13 greenway mtp-probe: checking bus 3, device 4: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-2"
Apr 8 22:24:13 greenway mtp-probe: bus: 3, device: 4 was not an MTP device
==> /var/log/Xorg.0.log <==
[ 5565.064] (II) config/udev: Adding input device CX 2.4G Receiver Mouse (/dev/input/mouse0)
[ 5565.064] (II) No input driver specified, ignoring this device.
[ 5565.064] (II) This device may have been added with another device file.
==> /var/log/auth.log <==
Apr 8 22:24:13 greenway systemd-logind[812]: Watching system buttons on /dev/input/event4 (CX 2.4G Receiver)
Apr 8 22:24:13 greenway systemd-logind[812]: Watching system buttons on /dev/input/event7 (CX 2.4G Receiver Consumer Control)
Apr 8 22:24:13 greenway systemd-logind[812]: Watching system buttons on /dev/input/event8 (CX 2.4G Receiver System Control)
==> /var/log/syslog <==
Apr 8 22:24:13 greenway mtp-probe: checking bus 3, device 4: "/sys/devices/pci0000:00/0000:00:14.0/usb3/3-2"
Apr 8 22:24:13 greenway mtp-probe: bus: 3, device: 4 was not an MTP device
==> /var/log/Xorg.0.log <==
[ 5565.097] (II) config/udev: Adding input device CX 2.4G Receiver (/dev/input/event4)
[ 5565.097] (**) CX 2.4G Receiver: Applying InputClass "libinput keyboard catchall"
[ 5565.097] (II) Using input driver 'libinput' for 'CX 2.4G Receiver'
[ 5565.097] (**) CX 2.4G Receiver: always reports core events
[ 5565.097] (**) Option "Device" "/dev/input/event4"
[ 5565.099] (II) event4 - CX 2.4G Receiver: is tagged by udev as: Keyboard
[ 5565.099] (II) event4 - CX 2.4G Receiver: device is a keyboard
[ 5565.099] (II) event4 - CX 2.4G Receiver: device removed
[ 5565.125] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.0/0003:3554:FC03.0003/input/input25/event4"
[ 5565.125] (II) XINPUT: Adding extended input device "CX 2.4G Receiver" (type: KEYBOARD, id 10)
[ 5565.125] (**) Option "xkb_model" "pc105"
[ 5565.125] (**) Option "xkb_layout" "us"
[ 5565.125] (WW) Option "xkb_variant" requires a string value
[ 5565.125] (WW) Option "xkb_options" requires a string value
[ 5565.126] (II) event4 - CX 2.4G Receiver: is tagged by udev as: Keyboard
[ 5565.126] (II) event4 - CX 2.4G Receiver: device is a keyboard
[ 5565.127] (II) config/udev: Adding input device CX 2.4G Receiver Consumer Control (/dev/input/event7)
[ 5565.127] (**) CX 2.4G Receiver Consumer Control: Applying InputClass "libinput keyboard catchall"
[ 5565.127] (II) Using input driver 'libinput' for 'CX 2.4G Receiver Consumer Control'
[ 5565.127] (**) CX 2.4G Receiver Consumer Control: always reports core events
[ 5565.127] (**) Option "Device" "/dev/input/event7"
[ 5565.127] (II) event7 - CX 2.4G Receiver Consumer Control: is tagged by udev as: Keyboard
[ 5565.127] (II) event7 - CX 2.4G Receiver Consumer Control: device is a keyboard
[ 5565.127] (II) event7 - CX 2.4G Receiver Consumer Control: device removed
[ 5565.157] (II) libinput: CX 2.4G Receiver Consumer Control: needs a virtual subdevice
[ 5565.157] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.1/0003:3554:FC03.0004/input/input28/event7"
[ 5565.157] (II) XINPUT: Adding extended input device "CX 2.4G Receiver Consumer Control" (type: MOUSE, id 11)
[ 5565.158] (**) Option "AccelerationScheme" "none"
[ 5565.159] (**) CX 2.4G Receiver Consumer Control: (accel) selected scheme none/0
[ 5565.159] (**) CX 2.4G Receiver Consumer Control: (accel) acceleration factor: 2.000
[ 5565.159] (**) CX 2.4G Receiver Consumer Control: (accel) acceleration threshold: 4
[ 5565.160] (II) event7 - CX 2.4G Receiver Consumer Control: is tagged by udev as: Keyboard
[ 5565.161] (II) event7 - CX 2.4G Receiver Consumer Control: device is a keyboard
[ 5565.161] (**) CX 2.4G Receiver Consumer Control: Applying InputClass "libinput keyboard catchall"
[ 5565.161] (II) Using input driver 'libinput' for 'CX 2.4G Receiver Consumer Control'
[ 5565.161] (**) CX 2.4G Receiver Consumer Control: always reports core events
[ 5565.161] (**) Option "Device" "/dev/input/event7"
[ 5565.161] (II) libinput: CX 2.4G Receiver Consumer Control: is a virtual subdevice
[ 5565.161] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.1/0003:3554:FC03.0004/input/input28/event7"
[ 5565.161] (II) XINPUT: Adding extended input device "CX 2.4G Receiver Consumer Control" (type: KEYBOARD, id 12)
[ 5565.161] (**) Option "xkb_model" "pc105"
[ 5565.161] (**) Option "xkb_layout" "us"
[ 5565.161] (WW) Option "xkb_variant" requires a string value
[ 5565.161] (WW) Option "xkb_options" requires a string value
[ 5565.163] (II) config/udev: Adding input device CX 2.4G Receiver Mouse (/dev/input/event5)
[ 5565.163] (**) CX 2.4G Receiver Mouse: Applying InputClass "libinput pointer catchall"
[ 5565.163] (II) Using input driver 'libinput' for 'CX 2.4G Receiver Mouse'
[ 5565.163] (**) CX 2.4G Receiver Mouse: always reports core events
[ 5565.163] (**) Option "Device" "/dev/input/event5"
[ 5565.164] (II) event5 - CX 2.4G Receiver Mouse: is tagged by udev as: Mouse
[ 5565.164] (II) event5 - CX 2.4G Receiver Mouse: device is a pointer
[ 5565.164] (II) event5 - CX 2.4G Receiver Mouse: device removed
[ 5565.193] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.1/0003:3554:FC03.0004/input/input26/event5"
[ 5565.193] (II) XINPUT: Adding extended input device "CX 2.4G Receiver Mouse" (type: MOUSE, id 13)
[ 5565.194] (**) Option "AccelerationScheme" "none"
[ 5565.195] (**) CX 2.4G Receiver Mouse: (accel) selected scheme none/0
[ 5565.195] (**) CX 2.4G Receiver Mouse: (accel) acceleration factor: 2.000
[ 5565.195] (**) CX 2.4G Receiver Mouse: (accel) acceleration threshold: 4
[ 5565.197] (II) event5 - CX 2.4G Receiver Mouse: is tagged by udev as: Mouse
[ 5565.198] (II) event5 - CX 2.4G Receiver Mouse: device is a pointer
[ 5565.199] (II) config/udev: Adding input device CX 2.4G Receiver System Control (/dev/input/event8)
[ 5565.199] (**) CX 2.4G Receiver System Control: Applying InputClass "libinput keyboard catchall"
[ 5565.199] (II) Using input driver 'libinput' for 'CX 2.4G Receiver System Control'
[ 5565.199] (**) CX 2.4G Receiver System Control: always reports core events
[ 5565.199] (**) Option "Device" "/dev/input/event8"
[ 5565.200] (II) event8 - CX 2.4G Receiver System Control: is tagged by udev as: Keyboard
[ 5565.201] (II) event8 - CX 2.4G Receiver System Control: device is a keyboard
[ 5565.201] (II) event8 - CX 2.4G Receiver System Control: device removed
[ 5565.221] (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:14.0/usb3/3-2/3-2:1.1/0003:3554:FC03.0004/input/input29/event8"
[ 5565.221] (II) XINPUT: Adding extended input device "CX 2.4G Receiver System Control" (type: KEYBOARD, id 15)
[ 5565.221] (**) Option "xkb_model" "pc105"
[ 5565.221] (**) Option "xkb_layout" "us"
[ 5565.221] (WW) Option "xkb_variant" requires a string value
[ 5565.221] (WW) Option "xkb_options" requires a string value
[ 5565.224] (II) event8 - CX 2.4G Receiver System Control: is tagged by udev as: Keyboard
[ 5565.224] (II) event8 - CX 2.4G Receiver System Control: device is a keyboard
[ 5565.226] (II) config/udev: Adding input device CX 2.4G Receiver (/dev/input/event6)
[ 5565.226] (II) No input driver specified, ignoring this device.
[ 5565.226] (II) This device may have been added with another device file.