With the recent switch to having the hid layer handle standard axis initialization, the Magic Trackpad now reports relative axes. This would be fine in the normal mode, but the driver puts the device in multitouch mode where no relative events are generated. Also, userspace software depends on accurate axis information for device type detection. Thus, ignoring the relative axes from the Magic Trackpad is best. Signed-off-by: Chase Douglas <chase.douglas@xxxxxxxxxxxxx> --- drivers/hid/hid-magicmouse.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/drivers/hid/hid-magicmouse.c b/drivers/hid/hid-magicmouse.c index e6dc151..ed732b7 100644 --- a/drivers/hid/hid-magicmouse.c +++ b/drivers/hid/hid-magicmouse.c @@ -433,6 +433,11 @@ static int magicmouse_input_mapping(struct hid_device *hdev, if (!msc->input) msc->input = hi->input; + /* Magic Trackpad does not give relative data after switching to MT */ + if (hi->input->id.product == USB_DEVICE_ID_APPLE_MAGICTRACKPAD && + field->flags & HID_MAIN_ITEM_RELATIVE) + return -1; + return 0; } -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
