From: Ali The GameSir G7 SE wired controller first enumerates as 3537:10a0 and then re-enumerates in a mode it picks from how the host enumerated it. When the configuration descriptor is fetched the Linux way, 9 bytes followed by the full 80, the controller disconnects about 1 ms after its string descriptors have been read, before SET_CONFIGURATION, and comes back as 3537:1082, a generic HID gamepad without force feedback. When the configuration descriptor is fetched in one 255-byte request, as Windows does, it comes back as 3537:1010 in Xbox One (GIP) mode, which xpad already supports, including rumble. Skipping the device qualifier requests (USB_QUIRK_DEVICE_QUALIFIER) makes no difference; the configuration descriptor request size alone decides the mode. Add USB_QUIRK_WINDOWS_CONFIG_REQ_SIZE for the 10a0 identity, as is already done for the ShanWan Wireless Gamepad. Cc: stable@vger.kernel.org Assisted-by: claude-opus-5-5 Signed-off-by: Ali --- Tested on 7.2.7 (x86_64, xHCI) by setting usbcore.quirks=3537:10a0:r at runtime. With it, the controller settles as 3537:1010 on every plug-in, is bound by xpad as "GameSir G7 SE", and rumble works through xpad's force feedback. Without it, it settles as 3537:1082 every time. The patch itself is against v7.3-rc5. usbmon of the 3537:10a0 enumeration without the quirk: GET_DESCRIPTOR (CONFIGURATION) with wLength 9, then 80, then string descriptors 0, 2, 1 and 3. The port reports a disconnect about 1 ms after the serial number string, and the SET_CONFIGURATION that follows fails with -EPROTO. With the quirk, the only difference is a single wLength 255 configuration request, after which the device re-enumerates as 3537:1010. --- drivers/usb/core/quirks.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c index b5b577f..a4bcbe9 100644 --- a/drivers/usb/core/quirks.c +++ b/drivers/usb/core/quirks.c @@ -612,6 +612,9 @@ static const struct usb_device_id usb_quirk_list[] = { /* ezcap401 - BOS descriptor fetch hangs at SuperSpeed Plus */ { USB_DEVICE(0x32ed, 0x0401), .driver_info = USB_QUIRK_NO_BOS }, + /* GameSir G7 SE */ + { USB_DEVICE(0x3537, 0x10a0), .driver_info = USB_QUIRK_WINDOWS_CONFIG_REQ_SIZE }, + /* DELL USB GEN2 */ { USB_DEVICE(0x413c, 0xb062), .driver_info = USB_QUIRK_NO_LPM | USB_QUIRK_RESET_RESUME }, --- base-commit: fd179f8a05be3ccae366b9b96e176b51fbe54aab change-id: 20260927-master-799b75b330e6 Best regards, -- Ali