cc. Same issue with 6.2.0-34-generic on an old i5 machine and Logitech K400 kbd w/integrated mousepad. # dmesg |grep -i logitech [ 5.648913] usb 2-1.1: Manufacturer: Logitech [ 13.148210] input: Logitech USB Receiver as /devices/pci0000:00/0000:00:1a.0/usb2/2-1/2-1.1/2-1.1:1.0/0003:046D:C52B.0001/input/input3 [ 13.208627] hid-generic 0003:046D:C52B.0001: input,hidraw0: USB HID v1.11 Keyboard [Logitech USB Receiver] on usb-0000:00:1a.0-1.1/input0 [ 13.208971] input: Logitech USB Receiver Mouse as /devices/pci0000:00/0000:00:1a.0/usb2/2-1/2-1.1/2-1.1:1.1/0003:046D:C52B.0002/input/input4 [ 13.209214] input: Logitech USB Receiver Consumer Control as /devices/pci0000:00/0000:00:1a.0/usb2/2-1/2-1.1/2-1.1:1.1/0003:046D:C52B.0002/input/input5 [ 13.268569] input: Logitech USB Receiver System Control as /devices/pci0000:00/0000:00:1a.0/usb2/2-1/2-1.1/2-1.1:1.1/0003:046D:C52B.0002/input/input6 [ 13.269157] hid-generic 0003:046D:C52B.0002: input,hiddev0,hidraw1: USB HID v1.11 Mouse [Logitech USB Receiver] on usb-0000:00:1a.0-1.1/input1 [ 13.269713] hid-generic 0003:046D:C52B.0003: hiddev1,hidraw2: USB HID v1.11 Device [Logitech USB Receiver] on usb-0000:00:1a.0-1.1/input2 When it was working # cat /var/log/Xorg.1.log.old | grep -i Logi [110891.923] (II) systemd-logind: took control of session /org/freedesktop/login1/session/_3438 [110891.925] (II) systemd-logind: got fd for /dev/dri/card1 226:1 fd 15 paused 0 [110891.927] (II) systemd-logind: got fd for /dev/dri/card0 226:0 fd 16 paused 0 [110891.940] (II) systemd-logind: releasing fd for 226:1 [110892.180] (II) systemd-logind: got fd for /dev/input/event1 13:65 fd 42 paused 0 [110892.213] (II) systemd-logind: got fd for /dev/input/event2 13:66 fd 45 paused 0 [110892.220] (II) systemd-logind: got fd for /dev/input/event0 13:64 fd 46 paused 0 [110892.228] (II) config/udev: Adding input device Logitech K400 Plus (/dev/input/event3) [110892.228] (**) Logitech K400 Plus: Applying InputClass "evdev pointer catchall" [110892.228] (**) Logitech K400 Plus: Applying InputClass "evdev keyboard catchall" [110892.228] (**) Logitech K400 Plus: Applying InputClass "libinput pointer catchall" [110892.228] (**) Logitech K400 Plus: Applying InputClass "libinput keyboard catchall" [110892.228] (II) Using input driver 'libinput' for 'Logitech K400 Plus' [110892.229] (II) systemd-logind: got fd for /dev/input/event3 13:67 fd 47 paused 0 [110892.229] (**) Logitech K400 Plus: always reports core events [110892.232] (II) event3 - Logitech K400 Plus: is tagged by udev as: Keyboard Mouse [110892.232] (II) event3 - Logitech K400 Plus: device is a pointer [110892.232] (II) event3 - Logitech K400 Plus: device is a keyboard [110892.233] (II) event3 - Logitech K400 Plus: device removed [110892.233] (II) libinput: Logitech K400 Plus: needs a virtual subdevice [110892.233] (II) XINPUT: Adding extended input device "Logitech K400 Plus" (type: MOUSE, id 9) [110892.233] (**) Logitech K400 Plus: (accel) selected scheme none/0 [110892.233] (**) Logitech K400 Plus: (accel) acceleration factor: 2.000 [110892.233] (**) Logitech K400 Plus: (accel) acceleration threshold: 4 [110892.235] (II) event3 - Logitech K400 Plus: is tagged by udev as: Keyboard Mouse [110892.236] (II) event3 - Logitech K400 Plus: device is a pointer [110892.236] (II) event3 - Logitech K400 Plus: device is a keyboard [110892.237] (II) config/udev: Adding input device Logitech K400 Plus (/dev/input/mouse0) [110892.247] (II) systemd-logind: got fd for /dev/input/event4 13:68 fd 48 paused 0 [110892.263] (**) Logitech K400 Plus: Applying InputClass "evdev pointer catchall" [110892.263] (**) Logitech K400 Plus: Applying InputClass "evdev keyboard catchall" [110892.263] (**) Logitech K400 Plus: Applying InputClass "libinput pointer catchall" [110892.263] (**) Logitech K400 Plus: Applying InputClass "libinput keyboard catchall" [110892.263] (II) Using input driver 'libinput' for 'Logitech K400 Plus' [110892.263] (II) systemd-logind: returning pre-existing fd for /dev/input/event3 13:67 [110892.263] (**) Logitech K400 Plus: always reports core events [110892.263] (II) libinput: Logitech K400 Plus: is a virtual subdevice [110892.263] (II) XINPUT: Adding extended input device "Logitech K400 Plus" (type: KEYBOARD, id 11) [110892.263] (II) systemd-logind: returning pre-existing fd for /dev/input/event4 13:68 [110938.912] (EE) event3 - Logitech K400 Plus: client bug: event processing lagging behind by 29ms, your system is too slow [466904.557] (EE) event3 - Logitech K400 Plus: client bug: event processing lagging behind by 26ms, your system is too slow [467200.761] (EE) event3 - Logitech K400 Plus: client bug: event processing lagging behind by 30ms, your system is too slow [467202.027] (EE) event3 - Logitech K400 Plus: client bug: event processing lagging behind by 24ms, your system is too slow [467596.881] (EE) event3 - Logitech K400 Plus: client bug: event processing lagging behind by 22ms, your system is too slow [495217.527] (EE) event3 - Logitech K400 Plus: client bug: event processing lagging behind by 32ms, your system is too slow [495249.881] (EE) event3 - Logitech K400 Plus: client bug: event processing lagging behind by 22ms, your system is too slow [495250.363] (EE) event3 - Logitech K400 Plus: client bug: event processing lagging behind by 24ms, your system is too slow [499669.923] (EE) event3 - Logitech K400 Plus: client bug: event processing lagging behind by 32ms, your system is too slow [499670.407] (EE) event3 - Logitech K400 Plus: client bug: event processing lagging behind by 36ms, your system is too slow [499700.257] (EE) event3 - Logitech K400 Plus: client bug: event processing lagging behind by 34ms, your system is too slow [567379.129] (II) event3 - Logitech K400 Plus: device removed [567379.696] (II) systemd-logind: not releasing fd for 13:68, still in use [567379.696] (II) systemd-logind: not releasing fd for 13:67, still in use [567379.696] (II) systemd-logind: releasing fd for 13:68 Now after latest updates # cat /var/log/Xorg.0.log | grep -i Logi [ 123.346] (II) systemd-logind: took control of session /org/freedesktop/login1/session/c1 [ 123.351] (II) systemd-logind: got fd for /dev/dri/card0 226:0 fd 14 paused 0 [ 123.354] (II) systemd-logind: got fd for /dev/dri/card1 226:1 fd 15 paused 0 [ 129.138] (II) systemd-logind: releasing fd for 226:0 [ 135.320] (II) systemd-logind: got fd for /dev/input/event1 13:65 fd 41 paused 0 [ 136.489] (II) systemd-logind: got fd for /dev/input/event2 13:66 fd 44 paused 0 [ 136.499] (II) systemd-logind: got fd for /dev/input/event0 13:64 fd 45 paused 0 [ 136.521] (II) systemd-logind: got fd for /dev/input/event7 13:71 fd 46 paused 0 [ 136.530] (II) config/udev: Adding input device LogiOps Virtual Input (/dev/input/event19) [ 136.530] (**) LogiOps Virtual Input: Applying InputClass "evdev pointer catchall" [ 136.530] (**) LogiOps Virtual Input: Applying InputClass "evdev keyboard catchall" [ 136.530] (**) LogiOps Virtual Input: Applying InputClass "libinput pointer catchall" [ 136.530] (**) LogiOps Virtual Input: Applying InputClass "libinput keyboard catchall" [ 136.530] (II) Using input driver 'libinput' for 'LogiOps Virtual Input' [ 136.531] (EE) systemd-logind: failed to take device /dev/input/event19: No such device [ 136.531] (**) LogiOps Virtual Input: always reports core events [ 136.532] (II) event19 - LogiOps Virtual Input: is tagged by udev as: Keyboard Mouse [ 136.533] (II) event19 - LogiOps Virtual Input: device is a pointer [ 136.533] (II) event19 - LogiOps Virtual Input: device is a keyboard [ 136.533] (II) event19 - LogiOps Virtual Input: device removed [ 136.560] (II) libinput: LogiOps Virtual Input: needs a virtual subdevice [ 136.560] (II) XINPUT: Adding extended input device "LogiOps Virtual Input" (type: MOUSE, id 10) [ 136.560] (**) LogiOps Virtual Input: (accel) selected scheme none/0 [ 136.561] (**) LogiOps Virtual Input: (accel) acceleration factor: 2.000 [ 136.561] (**) LogiOps Virtual Input: (accel) acceleration threshold: 4 [ 136.562] (II) event19 - LogiOps Virtual Input: is tagged by udev as: Keyboard Mouse [ 136.562] (II) event19 - LogiOps Virtual Input: device is a pointer [ 136.562] (II) event19 - LogiOps Virtual Input: device is a keyboard [ 136.563] (II) config/udev: Adding input device LogiOps Virtual Input (/dev/input/mouse1) [ 136.572] (II) systemd-logind: returning pre-existing fd for /dev/input/event7 13:71 [ 136.573] (**) LogiOps Virtual Input: Applying InputClass "evdev pointer catchall" [ 136.573] (**) LogiOps Virtual Input: Applying InputClass "evdev keyboard catchall" [ 136.573] (**) LogiOps Virtual Input: Applying InputClass "libinput pointer catchall" [ 136.573] (**) LogiOps Virtual Input: Applying InputClass "libinput keyboard catchall" [ 136.573] (II) Using input driver 'libinput' for 'LogiOps Virtual Input' [ 136.574] (EE) systemd-logind: failed to take device /dev/input/event19: No such device [ 136.574] (**) LogiOps Virtual Input: always reports core events [ 136.574] (II) libinput: LogiOps Virtual Input: is a virtual subdevice [ 136.574] (II) XINPUT: Adding extended input device "LogiOps Virtual Input" (type: KEYBOARD, id 12)