Hi Simon,
> We're going through our collection of touch screens, making sure that they all
> work with current kernels, and we've found one that doesn't work with today's
> Linus master.
>
> lsusb describes the screen as:
> Bus 006 Device 002: ID 0408:3001 Quanta Computer, Inc. Optical Touch Screen
What about 0408:3008, does that one work?
> Any ideas on the best way to resolve this regression?
What does 'cat /sys/bus/hid/devices/0003:0408:3001.0001/modalias' say?
The patch below ought to be enough to make it work, although it is
still unclear why it is needed.
Thanks,
Henrik
---
diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index bd4bc3c..2b775c3 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -963,7 +963,7 @@ static const struct hid_device_id mt_devices[] = {
MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH) },
{ .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
- MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
+ HID_USB_DEVICE(USB_VENDOR_ID_QUANTA,
USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001) },
{ .driver_data = MT_CLS_CONFIDENCE_CONTACT_ID,
MT_USB_DEVICE(USB_VENDOR_ID_QUANTA,
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