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Fixed in 5.3.0



Found in

Issue ID




Slow, system-crippling startup of D3D11 players with DisplayPort monitors

Graphics - General


1) Locate a machine with an NVIDIA graphics card where the monitor is connected via a DisplayPort connection.
2) Build a Windows Standalone player that is set to use the D3D11 API only.
3) Launch the player.
4) Observe that between double-clicking the executable and seeing the launcher appear, some time passes - anything from 2 seconds to 30 seconds - during which the entire OS is sluggish, almost to the point of being unresponsive.
5) Compare the behaviour to the same project built to use D3D9 - no delay is observed.

Comments (4)

  1. 8iVR

    Dec 16, 2015 21:59

    While DX11 is fixed in 5.3

    I can still reproduce this with GlCore on Windows.

  2. bteitler

    Oct 25, 2015 04:07

    Same issue..

  3. GarretPolk

    Jul 18, 2015 20:00

    More info:

    The game Rust (uses Unity) has the same issue. If you start it using DX11 (default) it chugs. Start it with DX9 and the resolution picking dialog appears in just a couple seconds.

    Nvidia GTX 770, drivers 353.30, Win7 x64

  4. GarretPolk

    Jul 17, 2015 20:08

    I can confirm this.

    I changed the cable on my monitor from DVI-D to DisplayPort and my DX11 project takes about 15 secs to show the resolution picking Unity dialog. Mouse cursor is sluggish and CPU is pinned during that time. I switched the project to DX9 and the problem goes away.

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