---
name: "ums"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["linux", "freebsd", "openbsd"]
url: "https://new.carta.tech/ums"
---

# ums(4)

USB HID mouse, touchscreen and digitiser devices

## NAME

**ums** – USB HID mouse, touchscreen and digitiser devices

## SYNOPSIS

**ums\*     at uhidev?** **wsmouse\* at ums? mux 0**

## DESCRIPTION

The **ums** driver provides support for USB HID mice, touchscreens and digitisers. Access to these devices is through the [wscons(4)](/wscons/4.md) driver.

If the touchscreen sensor is poorly aligned, then xtsscale(1) should be used to provide calibration results to the **ums** driver.

## SEE ALSO

xtsscale(1), [uhidev(4)](/uhidev/4.md), [usb(4)](/usb/4.md), [wsmouse(4)](/wsmouse/4.md)

## HISTORY

The **ums** driver first appeared in OpenBSD 2.8.

## AUTHORS

HID touchscreen and digitiser support was written by Robert Nagy and Matthieu Herrb then later merged into the generic **ums** driver by Edd Barrett.

## CAVEATS

Touchscreen and digitiser pressure sensitivity is not yet implemented.