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Fixed in 2020.2.X

Fixed in 2019.4.X, 2020.3.X

Votes

4

Found in

2018.4

2020.1.6f1

2020.2

Issue ID

1282463

Regression

No

Noticable mouse and keyboard input delay on a Vulkan standalone build when VSync is enabled

Vulkan

-

How to reproduce:
1. Open the user attached project (VulkanInputLag.zip)
2. Press Ctrl+B, select a build location and build the project
3. In the build, move the mouse in a circle around the screen
4. Notice the red dot's location in relation to the mouse pointer

Expected result: the red dot is almost always under the mouse pointer
Actual result: the red dot trails behind the mouse cursor

Reproducible with: 2018.4.28f1, 2019.4.12f1, 2020.1.8f1, 2020.2.0b6

Notes:
1. Reproducible on Ubuntu 18.04 and Windows 10, only using the Vulkan graphics API
2. Both the old and new Input Systems have this issue
3. Not reproducible on the Editor

  1. Resolution Note (fix version 2020.2):

    Fixed in 2021.2.0a10

  2. Resolution Note (fix version 2020.3):

    Fixed in 2020.3.17f1

  3. Resolution Note (fix version 2019.4):

    Fixed in 2019.4.35f1

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Comments (3)

  1. florianhaenel-lge

    Mar 04, 2022 10:16

    I am seeing this on 2020.3.25f1 on linux 5.13.0-30-lowlatency with nvidia-dkms 510.47.03-0ubuntu0.21.10.1
    The lag is 1-2 seconds (!)

  2. Alverik

    May 29, 2021 13:59

    Wish I had seen this before, spent hours trying to figure out why I had input lag in my build. Luckily I remembered I had switched to Vulkan the day before and decided to changed it just in case...

  3. liamdawe

    Nov 07, 2020 17:48

    This is affecting Superliminal on Linux with Vulkan -> https://steamcommunity.com/app/1049410/discussions/0/3005551013340762110/

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