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Firmware Post Time test

This verifies that systems with integrated displays are able to meet Post requirements by performing a Windows shutdown and user-initialized power-up.

Test details


Associated requirements


See the system hardware requirements.


Windows RT (ARM-based)
Windows 8 (x64)
Windows 8 (x86)
Windows RT 8.1
Windows 8.1 x64
Windows 8.1 x86

Expected run time

~22 minutes





Running the test

Before you run the test, complete the test setup as described in the test requirements: WDTF System Fundamentals Testing Prerequisites.

The system should not be running the Microsoft Generic Display driver.

The system should support Hibernate.


For troubleshooting information, see Troubleshooting System Fundamentals Testing.

The most common failure is an ACPI Revision issue. This test relies on the firmware’s FPDT/FBPT ACPI tables to calculate total post time. The test cannot gather this info if the ACPI’s Revision is less than 5.

If the system fails to make post time, make sure the system is booting to the Windows Boot Manager before network or other devices that take time to enumerate. The firmware needs to enumerate only the bus device that is in the current boot option.

More information

/PTR (Post Time Reboot) is an automated restart command that is used on ARM or systems that do not support hybrid shutdown or hibernate.

Verify the firmware returns the post time in nanoseconds and not milliseconds. Using milliseconds can result in a Pass when the system should Fail. This is currently only a warning in the test.

Command syntax


Command Description


Displays help information for the test. There are two command line arguments that are useful—one for setup, and one for result processing.

uefilogo.exe /PTRM

Post Time Reboot Manual – This prepares the system for a manual restart. The user is prompted to shut down the system and to power it back on after 30 seconds.

uefilogo.exe /PTM

Post Time Manual – This gathers the logs and, if necessary, prompts the user about the display and disk (for hybrid disks).

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