This issue, especially comment #7 looks very much like the issues I've been having since I installed Ubuntu on my desktop for the first time.
I have described the issue in this askubuntu post more in detail: https://askubuntu.com/questions/1286301/ubuntu-20-04-1-lts-mouse- removed-and-added-intermittently Log messages when the issue occurs: ``` nov 08 19:33:19 trillian kernel: usb 2-1.4.2: USB disconnect, device number 15 nov 08 19:33:19 trillian /usr/lib/gdm3/gdm-x-session[3785]: (II) config/udev: removing device Logitech Gaming Mouse G400 nov 08 19:33:19 trillian /usr/lib/gdm3/gdm-x-session[3785]: (**) Option "fd" "78" nov 08 19:33:19 trillian /usr/lib/gdm3/gdm-x-session[3785]: (II) event2 - Logitech Gaming Mouse G400: device removed nov 08 19:33:19 trillian /usr/lib/gdm3/gdm-x-session[3785]: (II) UnloadModule: "libinput" nov 08 19:33:19 trillian /usr/lib/gdm3/gdm-x-session[3785]: (II) systemd-logind: releasing fd for 13:66 nov 08 19:33:19 trillian kernel: usb 2-1.4.2: new full-speed USB device number 16 using ehci-pci nov 08 19:33:20 trillian kernel: usb 2-1.4.2: New USB device found, idVendor=046d, idProduct=c245, bcdDevice=69.00 nov 08 19:33:20 trillian kernel: usb 2-1.4.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0 nov 08 19:33:20 trillian kernel: usb 2-1.4.2: Product: Gaming Mouse G400 nov 08 19:33:20 trillian kernel: usb 2-1.4.2: Manufacturer: Logitech nov 08 19:33:20 trillian kernel: input: Logitech Gaming Mouse G400 as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.4/2-1.4.2/2-1.4.2:1.0/0003:046D:C245.0016/input/input29 nov 08 19:33:20 trillian kernel: hid-generic 0003:046D:C245.0016: input,hidraw0: USB HID v1.10 Mouse [Logitech Gaming Mouse G400] on usb-0000:00:1d.0-1.4.2/input0 nov 08 19:33:20 trillian kernel: hid-generic 0003:046D:C245.0017: hiddev0,hidraw1: USB HID v1.10 Device [Logitech Gaming Mouse G400] on usb-0000:00:1d.0-1.4.2/input1 nov 08 19:33:20 trillian mtp-probe[7109]: checking bus 2, device 16: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.4/2-1.4.2" nov 08 19:33:20 trillian mtp-probe[7109]: bus: 2, device: 16 was not an MTP device nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (II) config/udev: Adding input device Logitech Gaming Mouse G400 (/dev/input/mouse0) nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (II) No input driver specified, ignoring this device. nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (II) This device may have been added with another device file. nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[2421]: (II) config/udev: Adding input device Logitech Gaming Mouse G400 (/dev/input/mouse0) nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[2421]: (II) No input driver specified, ignoring this device. nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[2421]: (II) This device may have been added with another device file. nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[2421]: (II) config/udev: Adding input device Logitech Gaming Mouse G400 (/dev/input/event2) nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (II) config/udev: Adding input device Logitech Gaming Mouse G400 (/dev/input/event2) nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (**) Logitech Gaming Mouse G400: Applying InputClass "libinput pointer catchall" nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (II) Using input driver 'libinput' for 'Logitech Gaming Mouse G400' nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[2421]: (**) Logitech Gaming Mouse G400: Applying InputClass "libinput pointer catchall" nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[2421]: (II) Using input driver 'libinput' for 'Logitech Gaming Mouse G400' nov 08 19:33:20 trillian mtp-probe[7117]: checking bus 2, device 16: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.4/2-1.4.2" nov 08 19:33:20 trillian mtp-probe[7117]: bus: 2, device: 16 was not an MTP device nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[2421]: (II) systemd-logind: got fd for /dev/input/event2 13:66 fd 27 paused 1 nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[2421]: (II) systemd-logind: releasing fd for 13:66 nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (II) systemd-logind: got fd for /dev/input/event2 13:66 fd 78 paused 0 nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (**) Logitech Gaming Mouse G400: always reports core events nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (**) Option "Device" "/dev/input/event2" nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (**) Option "_source" "server/udev" nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (II) event2 - Logitech Gaming Mouse G400: is tagged by udev as: Mouse nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (II) event2 - Logitech Gaming Mouse G400: device set to 800 DPI nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (II) event2 - Logitech Gaming Mouse G400: device is a pointer nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (II) event2 - Logitech Gaming Mouse G400: device removed nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (**) Option "config_info" "udev:/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.4/2-1.4.2/2-1.4.2:1.0/0003:046D:C245.0016/input/input29/event2" nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (II) XINPUT: Adding extended input device "Logitech Gaming Mouse G400" (type: MOUSE, id 8) nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (**) Option "AccelerationScheme" "none" nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (**) Logitech Gaming Mouse G400: (accel) selected scheme none/0 nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (**) Logitech Gaming Mouse G400: (accel) acceleration factor: 2.000 nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (**) Logitech Gaming Mouse G400: (accel) acceleration threshold: 4 nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (II) event2 - Logitech Gaming Mouse G400: is tagged by udev as: Mouse nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (II) event2 - Logitech Gaming Mouse G400: device set to 800 DPI nov 08 19:33:20 trillian /usr/lib/gdm3/gdm-x-session[3785]: (II) event2 - Logitech Gaming Mouse G400: device is a pointer ``` -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1794245 Title: Attached USB devices are ignored. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1794245/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
