This article applies to:
Multiple monitor experiments run on Windows 10 May 2020 Update (Version 2004) cause E-Prime to either report the "Display is too busy" runtime error or freeze.
What is Windows 10 May 2020 Update?
Windows 10 May 2020 Update (version 2004, build 19041) is the first major update to Windows 10 released in 2020.
What is the impact on E-Prime?
One of E-Prime’s most important features is its ability to achieve and maintain millisecond accuracy. E-Prime takes numerous precautions to both ensure that your experiment’s timing is accurate and to monitor and flag when timing inaccuracies may be present.
With each Windows release, Psychology Software Tools performs a large battery of tests across a variety of configurations to confirm E-Prime's timing integrity. Our preliminary testing suggests has shown that multiple monitor experiments may freeze or produce the "Display Too Busy" error when run on systems that have NVIDIA or AMD chipsets. Users experiencing this runtime error or freezing should enable the workaround below.
NOTE: The "Display is too busy" error message can occur for other reasons, primarily when other external programs attempt to update the display during an experiment. The "Display is too busy" error is therefore not specific to the Windows 10 May 2020 Update issue.
The following workarounds are possible:
Disable the Fullscreen Optimizations setting for E-Prime. This setting needs to be edited per user account.
Follow these steps to disable this setting:
Navigate to C:\Program Files (x86)\PST\E-Prime 3.0\Program.
Find the E-Studio application.
Right-click on the E-Studio application and select Properties.
Navigate to the Compatibility tab in the E-Studio Properties.
Check "Disable full screen optimizations."
Click OK to confirm the changes.
NOTE: If using E-Run, perform steps 2-6 on the E-Run application.
NOTE: While PST's timing was accurate in-house, timing should be verified by external hardware to ensure millisecond accuracy. For example, users can verify timing by using Chronos and a photosensor to ensure that Stimulus onset and monitor refresh rates are accurate.
Optionally, you may refrain from upgrading your machine to Windows 10 version 2004. Currently, this issue has not been reported on previous versions of Windows 10 (e.g., Windows 10 October Update (1809)).