ERROR: G-Sync and FreeSync may cause freezing and runtime errors [37035]

This article applies to:

E-Prime 3.0

E-Prime 2.0

E-Prime 1.x

NOTE: This issue has only been replicated using G-Sync at this time. Please share any FreeSync issues and results with PST Support or comment below so that we may update this article accordingly.

NOTE: Please see To know if G-SYNC is enabled for your game (nvidia.com) and How to Enable AMD FreeSync™ | AMD if you are not sure if you are using G-Sync or FreeSync. For AMD, check for the presence of "Radeon FreeSync" and if it's Enabled.

Symptoms

Freezing or an "Unable to obtain a valid refresh rate" error occurs when running an experiment with G-Sync or FreeSync enabled.

Detail

E-Prime uses the vertical blank for timing of when E-Objects appear on-screen. This allows consistent refresh rates and accurate timing to be achieved.

E-Prime relies on fixed refresh rates and does not detect when the vertical blank changes. The use of variable refresh rates allows E-Objects to display inconsistently which negatively impacts timing.

Solution

The following solutions are possible:

Solution 1

Disable G-Sync and FreeSync on your monitor and/or in its graphic settings.

NVIDIA:

1. Open NVIDIA Control Panel.
2. Select "Set Up G-SYNC".
3. Uncheck the box "Enable G-SYNC".

AMD:

1. Open AMD Radeon Software.
2. Select the "Display" tab.
3. Uncheck the box "AMD FreeSync".

NOTE: This can also be disabled physically on the monitor. For more information on how to disable G-Sync and FreeSync on the monitor or in software, consult with the hardware manufacturer.

Solution 2

In the graphics settings set the E-Studio and E-Run program to use a "Fixed Refresh".

NVIDIA:

1. Open NVIDIA Control Panel.
2. Select "Manage 3D Settings".
3. Select "Program Settings" tab.
4. Click "Add" button.
5. Browse and select the application (e.g., E-Studio and E-Run) or use the entire E-Prime folder.
6. Locate Monitor Technology and set it to "Fixed Refresh Rate". 

AMD:

1. Open AMD Radeon Software.
2. Select the "Gaming" tab.
3. Click "Add" button.
4. Browse and select the application (e.g., E-Studio and E-Run).
5. Select the added application.
6. Locate AMD FreeSync and set it to "Off". 

For more information, consult with the hardware manufacturer.

See Also:

RELEASE INFO: Known Issues in E-Prime 3.0 [27789]

RELEASE INFO: Known issues in E-Prime 2.0 [19406]

ERROR: Experiments run on Windows 10 (1903 & 1909) freeze or receive a display is too busy error (Error 11102) [30679]

ERROR: AMD or NVIDIA overlay appearing on screen when running experiments [34405]

ERROR: Multiple monitor experiments run on Windows 10 or Windows 11 freeze or receive a display is too busy error (Error 11102) [35180]