http://bugzilla.opensuse.org/show_bug.cgi?id=1209032 Bug ID: 1209032 Summary: Keychron K8 kearboard kernel warning: unknown main item tag 0x0 Classification: openSUSE Product: openSUSE Tumbleweed Version: Current Hardware: x86-64 OS: openSUSE Tumbleweed Status: NEW Severity: Minor Priority: P5 - None Component: Kernel Assignee: kernel-bugs@opensuse.org Reporter: mpdesouza@suse.com QA Contact: qa-bugs@suse.de Found By: --- Blocker: --- I'm using a Keychron K8 keyboard connected via Bluetooth using the "Windows compatibility mode", and started seeing this on dmesg: [100376.456869] apple 0005:05AC:024F.001B: unknown main item tag 0x0 [100376.457182] apple 0005:05AC:024F.001B: Non-apple keyboard detected; function keys will default to fnmode=2 behavior [100376.457264] input: Keychron K8 as /devices/pci0000:00/0000:00:14.0/usb2/2-10/2-10:1.0/bluetooth/hci0/hci0:768/0005:05AC:024F.001B/input/input64 [100376.462635] apple 0005:05AC:024F.001B: input,hidraw7: BLUETOOTH HID v1.07 Keyboard [Keychron K8] on d4:54:8b:88:20:42 I'm running an updates TW system, kernel 6.2.1-1-default. I started to check the hid-core, on hid_parser_main: ... switch (item->tag) { case HID_MAIN_ITEM_TAG_BEGIN_COLLECTION: ret = open_collection(parser, data & 0xff); break; case HID_MAIN_ITEM_TAG_END_COLLECTION: ret = close_collection(parser); break; case HID_MAIN_ITEM_TAG_INPUT: ret = hid_add_field(parser, HID_INPUT_REPORT, data); break; case HID_MAIN_ITEM_TAG_OUTPUT: ret = hid_add_field(parser, HID_OUTPUT_REPORT, data); break; case HID_MAIN_ITEM_TAG_FEATURE: ret = hid_add_field(parser, HID_FEATURE_REPORT, data); break; default: hid_warn(parser->device, "unknown main item tag 0x%x\n", item->tag); ret = 0; } ... But I don't know the HID protocols in order to detect what is the issue. I can only check that, all these case statements search for a value that is bigger than 0, actually values from 8 to 12. Please let me know if I can provide more information to understand what's going on. Thanks -- You are receiving this mail because: You are the assignee for the bug.