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The kernel enumerates it as two input nodes ("06CB:CE4B Touchpad" and "06CB:CE4B Mouse"), but the stick node never receives events: pushing the stick makes the device generate a steady stream of I2C interrupts, so the firmware is reporting data - the reports are just never forwarded to the stick input node. The device currently falls back to the default Win8 class, which keeps HID_QUIRK_INPUT_PER_APP. That report routing does not work for this hardware. The 0xcddc sibling found in some Toshiba/dynabook Portege X30 and X40 models had the exact same problem, fixed by commit 1741a8269e1c ("HID: multitouch: Add required quirk for Synaptics 0xcddc device") by switching to HID_QUIRK_MULTI_INPUT. Add the same MT_CLS_WIN_8_FORCE_MULTI_INPUT quirk for 0xce4b. Tested on a Dynabook Portege X40-J (PPH11A-09J002) with kernel v7.1.9: with the quirk applied, the Accupoint moves the pointer, its three buttons work, and touchpad movement and gestures behave as before. Link: https://bugzilla.kernel.org/show_bug.cgi?id=205817 Signed-off-by: chenshuyang --- drivers/hid/hid-multitouch.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c index 2c41bac..57e37e7 100644 --- a/drivers/hid/hid-multitouch.c +++ b/drivers/hid/hid-multitouch.c @@ -2620,6 +2620,10 @@ static const struct hid_device_id mt_devices[] = { HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8, USB_VENDOR_ID_SYNAPTICS, 0xce09) }, + { .driver_data = MT_CLS_WIN_8_FORCE_MULTI_INPUT, + HID_DEVICE(BUS_I2C, HID_GROUP_MULTITOUCH_WIN_8, + USB_VENDOR_ID_SYNAPTICS, 0xce4b) }, + /* TopSeed panels */ { .driver_data = MT_CLS_TOPSEED, MT_USB_DEVICE(USB_VENDOR_ID_TOPSEED2, -- 2.55.0