Measured requirements include: having a bezel that is flush with the display, specifying physical dimensions that match the device's true physical dimensions, and passing the HID Validator tool's static test. The Windows Touch Test combines a set of simple manual tests. Tests in this feature area might have additional documentation, including prerequisites, setup, and troubleshooting information, that can be found in the following topic(s):īefore you run the test, complete the test setup as described in the test requirements: Windows Touch Testing Prerequisites. We have UPDD compatible TUIO servers, that receive touch directly from the driver via the UPDD API, for Windows and MacOS but have not created one for Linux - contact us to discuss further if a UPDD TUIO server is required.This test verifies that a Windows Touch device meets requirements. If running a TUIO client application you will need a TUIO server installed to receive touch input and post out on the TUIO protocol. Note that the exact details in these outputs may vary. If UPDD single touch is listed instead check the setting uinput.multi_touchĪssuming the device is listed, enter the number (10 in this example) and you will see the attributes of the device.Īnd this is the end of the data when touches stop: If this does not exist and no other UPDD entries are seen then UPDD is not running or is not configured correctly. In this example the UPDD MT virtual device is device 10: You can use evtest to see information about the virtual driver and what/if any events are occurring.Įnter sudo evtest in a bash shell to list the devices. If touch or a specific application is not working when configured via uinput it might be useful to examine the status of the UPDD virtual device and the output from it. This is independent of the Linux event system so will work in all cases. If you are developing software to support multi-touch you can use the UPDD API. You can also tap with 2 fingers to get a context menu in Chrome. Now move your fingers closer together and note that the screen image returns to its original size. The screen image size should gradually increase. With the browser window focused, place 2 fingers on the screen near the center and move them away from each other. Therefore, for a first test we recommend that you install Chrome or Chromium. This official documentation suggests otherwise but we have tested with a range of hardware and not seen anything to suggest this does work in the current version. We believe that when using Ubuntu with the Unity desktop certain gestures should work but Unity version 7.4.0 used during our tests does not appear to support multi-touch gestures, or if it does, we have not been successful in enabling it. The state of out of the box support is difficult to determine for Linux distributions. Enabling multi-touch instructs the driver to create a MT compatible virtual device and post single (the default) and multi touch events to the event system via this device.This is likely to be the case for any Linux distro that supports MT, but in any case you can use any appropriate means including a reboot to restart the driver. The stop / start instructions assume a system using systemd.upddutils nodevice set uinput.multi_touch 1 If you have not already done so create the environment to work with UPDD tools The MT system interface is enabled with the following commands You should see one line drawn for each finger as in this example showing 3 finger drawing.Įnabling the multi touch system interfaceīy default the MT system interface is disabled as otherwise the driver will not work out of the box with some Linux kernel versions that do not support MT. The run the UPDD Test program.ĭraw with multiple fingers on the touch screen. Ubuntu 17.10 been released but has been withdrawn from the primary download site due to issues.įirstly install the driver as documented. This is the latest available as of the date of writing (Dec 2017). The Linux distribution referenced in this text is Ubuntu 16.04.03 LTS. This article gives a number of pointers of how to setup and test multi-touch. However, most modern touch devices support multi-touch and in some cases you may have a multi-touch client application that you wish to run with UPDD.įor multi-touch to work the client software (including the desktop manager if required) must also support multi touch.Īs this support is patchy and somewhat hardware dependent it is generally the case that this does not work "out of the box". If it doesn't many of the steps here can be used to test touch generally. Given that most Linux distributions support single touch via X or the event subsystem uinput then by default the UPDD driver will initially be configured to post single touch data via uinput (if the component exists) or X.
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