Hi to all! I can unfortunately confirm this "unknown main item tag 0x0" error also for Kubuntu 20.04 and kernel 5.11.0-27. The used hardware is an Apple Magic Mouse 2 at an iMac8,1. It should be noted that Kubuntu is running in native (U)EFI mode, not in legacy CSM Bios-emulation. Maybe this fact has here some relevance. The coresponding dmesg output regarding this issue looks as follows:
[ 90.797431] hid-generic 0005:004C:0269.0007: unknown main item tag 0x0 [ 90.797529] input: Franzs Maus Mouse as /devices/pci0000:00/0000:00:1d.0/usb5/5-2/5-2.3/5-2.3:1.0/bluetooth/hci0/hci0:11/0005:004C:0269.0007/input/input12 [ 90.797780] input: Franzs Maus as /devices/pci0000:00/0000:00:1d.0/usb5/5-2/5-2.3/5-2.3:1.0/bluetooth/hci0/hci0:11/0005:004C:0269.0007/input/input13 [ 90.797871] hid-generic 0005:004C:0269.0007: input,hidraw3: BLUETOOTH HID v0.70 Mouse [Franzs Maus] on 60:f8:1d:ad:62:e1 [ 90.873387] magicmouse 0005:004C:0269.0007: unknown main item tag 0x0 [ 90.873514] input: Franzs Maus as /devices/pci0000:00/0000:00:1d.0/usb5/5-2/5-2.3/5-2.3:1.0/bluetooth/hci0/hci0:11/0005:004C:0269.0007/input/input14 [ 90.873768] magicmouse 0005:004C:0269.0007: input,hidraw3: BLUETOOTH HID v0.70 Mouse [Franzs Maus] on 60:f8:1d:ad:62:e1 [ 90.973119] hid-generic 0005:004C:0269.0007: unknown main item tag 0x0 [ 90.973202] input: Franzs Maus Mouse as /devices/pci0000:00/0000:00:1d.0/usb5/5-2/5-2.3/5-2.3:1.0/bluetooth/hci0/hci0:11/0005:004C:0269.0007/input/input15 [ 90.973321] input: Franzs Maus as /devices/pci0000:00/0000:00:1d.0/usb5/5-2/5-2.3/5-2.3:1.0/bluetooth/hci0/hci0:11/0005:004C:0269.0007/input/input16 [ 90.973390] hid-generic 0005:004C:0269.0007: input,hidraw3: BLUETOOTH HID v0.70 Mouse [Franzs Maus] on 60:f8:1d:ad:62:e1 [ 93.041395] magicmouse 0005:004C:0269.0007: unknown main item tag 0x0 [ 93.041508] input: Franzs Maus as /devices/pci0000:00/0000:00:1d.0/usb5/5-2/5-2.3/5-2.3:1.0/bluetooth/hci0/hci0:11/0005:004C:0269.0007/input/input17 [ 93.041685] magicmouse 0005:004C:0269.0007: input,hidraw3: BLUETOOTH HID v0.70 Mouse [Franzs Maus] on 60:f8:1d:ad:62:e1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1834085 Title: Bluetooth touchpad (Apple Magic Trackpad) disconnects every few minutes To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1834085/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs