Home Forums Software Development dev "Windows snap assist" feature occasionally breaks typing in W10 insider preview

This topic contains 3 replies, has 2 voices, and was last updated by Profile photo of Grant [Tobii] Grant [Tobii] 5 months, 1 week ago.

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  • #7577
    Profile photo of twentythree

    After my last Windows update, several applications started showing weird behavior, namely the text cursor had acquired a tendency to wander left during typing, making accurate typing impossible. I managed to track down two causes:
    1. My gaze was resting somewhere near the bottom of my primary screen, and
    2. The Tobii “Windows snap assist” feature had to be enabled.
    Turning off snap assist made my system behave normally again.

    Windows version: Windows 10 Pro Insider Preview, build 17035
    Tobii version(s):

    Hardware: GA-H81M-D2V, CPU: Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz, RAM: 8GB
    OS Version: Microsoft Windows [Version 10.0.17035.0] x64
    Tobii Eye Tracking Core SW
    Eye tracker model IS4 Large Peripheral
    Serial number IS404-100106843311
    Firmware 2.18.0-fff1f21
    Tobii Controller Core Not available
    Tobii USB Service Not available
    Tobii Controller Driver 2.0.4
    Tobii Service
    Tobii Engine
    Tobii Config
    Tobii Interaction
    Tobii Face Authentication for Windows Hello
    Tobii Overview
    Tobii Intro

    Profile photo of Grant [Tobii]
    Grant [Tobii]

    Hi @twentythree, thanks for your report. I have been trying to reproduce this behaviour without success.

    Could you kindly be explicit in which software you were running when the text cursor was moving (ie Chrome, Word, etc)
    The cursor would not move if you were looking toward the top of the screen is that correct?
    Also, I assume you are running the latest version of the Tobii Tracking Software?

    Thanks for the details, we will try to and squash this bug as soon as possible.

    Profile photo of twentythree

    As far as I can tell, I’m running the latest Tobii software, at least I get no updates when I check for them. I posted the precise versions above.

    It doesn’t seem to matter what window I’ve focused, I’ve reproduced this in Firefox, Notepad, the Windows start menu, Windows settings, Tobii settings, Explorer, etc.
    A low level keyboard hook (WH_KEYBOARD_LL) shows me injected keyboard events (flags: LLKHF_INJECTED, vkCode: 37, scanCode: 0; as opposed to regular inputs that have a scanCode set), most likely sent by Tobii software.
    As for when exactly it happens, refer to the following screencast – it also seems to depend on what’s in the background: http://download.tiitoo.com/screencasts/2017-11-15%2017-09-20.mp4

    In case it doesn’t reproduce for you, did you try this on a Windows Insider Build?

    Profile photo of Grant [Tobii]
    Grant [Tobii]

    Hi @twentythree, that video is brilliant, thank you! I will create the appropriate bug report and we can try now to reproduce this in house using the Windows Insider Build.

    We should hopefully have some news for you soon.

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