Wireless USB Touchpad not working as mouse. Why?

Question

I have recently bought a Logitech T650 wireless USB touchpad. This touchpad works fine in the Raspbian desktop environment.

But when I run some applications, this mouse doesn't work inside the application. The regular mouses (both wired and wireless) work fine (move, click, ...), but this T650 mouse doesn't work inside some applications.

For example:

• 3D Frog for RPi
• Urho3D games

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I checked /dev/input, and the Logitech USB receiver is listed there.

pi@raspberrypi:/dev/input/by-id $ ls

usb-2188_USB_OPTICAL_MOUSE-event-mouse
usb-2188_USB_OPTICAL_MOUSE-mouse
usb-Logitech_USB_Receiver-if02-event-mouse
usb-Logitech_USB_Receiver-if02-mouse
usb-USB_USB_Keyboard-if01-mouse
usb-USB_USB_Keyboard-event-kbd
usb-USB_USB_Keyboard-if01-event-mouse

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I tried booting into CLI (text mode) which is without X. But still the touchpad mouse doesn't work during the game.

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Any suggestions?

How can I make this wireless USB touchpad work inside all applications?

Your help would be highly appreciated. Thanks for your time.

Answer 1

I found the answer to this problem in the following topic:

https://unix.stackexchange.com/questions/231139/libinput-touchpad-is-dead-around-the-perimter

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Summary:

1. Create a new file /etc/modprobe.d/hid_logitech_hidpp.conf and add options hid_logitech_hidpp disable_raw_mode=1 to it.

2. Power off the host, remove the "unifying receiver" (the little USB dongle) and turn off the T650 (set the switch on the left so that it shows red).

3. Power on the host and go through the Linux boot process.
4. Re-insert the receiver and turn the T650 back on.

Answer 2

I am not sure this counts as a specific answer but as you are using a Logitech "Unifying" receiver you may like to get the Solaar utility from its Github site or an older version from the solaar package in the Raspbian (assuming that is what you are using of course) distribution. This is an active project (so the Github version is likely to have more bells and whistles for later devices) to provide the functionality for pairing devices and other product features that Logitech don't provide themselves for non-Win/Mac OSes...! There are both GUI and CLI versions in the software.