[PATCH] HID: add quirk for IBM SK-8845 keyboard

[TheDragonWhoAte]

HID: add quirk for IBM SK-8845 keyboard

The TrackPoint on the IBM SK-8845 (Synaptics 06cb:0009) sends corrupted
input events when bound to the synaptics_usb driver. Moving the stick
generates random BTN_LEFT/BTN_RIGHT/BTN_MIDDLE events instead of
REL_X/REL_Y movement.

Force the device to bind to hid-generic instead by setting
HID_QUIRK_IGNORE_SPECIAL_DRIVER.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=221624

Note: This quirk disables two-finger scrolling on the touchpad. That's a trade-off, but without it the TrackPoint is completely unusable. The real fix would be to make synaptics_usb handle this device properly, so both the touchpad gestures and the TrackPoint work. That's beyond this patch.

Signed-off-by: TheDragonWhoAte <TheDragonWhoAte@xxxxxxxxxxxxxx>From 0bc38d7fac65dc07f48e074130329924adf5744b Mon Sep 17 00:00:00 2001
From: thedragonwhoate <thedragonwhoate@xxxxxxxxxxxxxx>
Date: Wed, 10 Jun 2026 06:38:03 +0300
Subject: [PATCH] HID: add quirk for IBM SK-8845 keyboard
To: linux-input@xxxxxxxxxxxxxxx

The TrackPoint on the IBM SK-8845 (Synaptics 06cb:0009) sends corrupted
input events when bound to the synaptics_usb driver. Moving the stick
generates random BTN_LEFT/BTN_RIGHT/BTN_MIDDLE events instead of
REL_X/REL_Y movement.

Force the device to bind to hid-generic instead by setting
HID_QUIRK_IGNORE_SPECIAL_DRIVER.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=221624

Note: This quirk disables two-finger scrolling on the touchpad. That's a trade-off, but without it the TrackPoint is completely unusable. The real fix would be to make synaptics_usb handle this device properly, so both the touchpad gestures and the TrackPoint work. That's beyond this patch.

Signed-off-by: thedragonwhoate <thedragonwhoate@xxxxxxxxxxxxxx>
---
 drivers/hid/hid-quirks.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/hid/hid-quirks.c b/drivers/hid/hid-quirks.c
index 57d8efdd9..c8394b896 100644
--- a/drivers/hid/hid-quirks.c
+++ b/drivers/hid/hid-quirks.c
@@ -203,6 +203,7 @@ static const struct hid_device_id hid_quirks[] = {
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_TP_V103), HID_QUIRK_NO_INIT_REPORTS },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_DELL_K12A), HID_QUIRK_NO_INIT_REPORTS },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_DELL_K15A), HID_QUIRK_NO_INIT_REPORTS },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_COMP_TP), HID_QUIRK_IGNORE_SPECIAL_DRIVER },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_TOPMAX, USB_DEVICE_ID_TOPMAX_COBRAPAD), HID_QUIRK_BADPAD },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_TOUCHPACK, USB_DEVICE_ID_TOUCHPACK_RTS), HID_QUIRK_MULTI_INPUT },
 	{ HID_USB_DEVICE(USB_VENDOR_ID_TPV, USB_DEVICE_ID_TPV_OPTICAL_TOUCHSCREEN_8882), HID_QUIRK_NOGET },
-- 
2.54.0