Bug ID 991309: 'TPM Randomization failed' message displays in the log.

Last Modified: Dec 07, 2023

Affected Product(s):
F5OS Install/Upgrade, Velos(all modules)

Known Affected Versions:
F5OS-C 1.1.0, F5OS-C 1.1.1, F5OS-C 1.1.2, F5OS-C 1.1.3, F5OS-C 1.1.4

Opened: Feb 08, 2021

Severity: 3-Major


When the BIOS on a blade is freshly updated and the blade is booted, there may be a 'TPM Randomization failed' message observed in the log output. This message occurs only once (if at all) and is then followed by a successful boot of the system. This is caused by the TPM randomization step of the boot not being completed. The next boot of the system, initiated by the BIOS when this condition is encountered, allows the TPM randomization to complete. For security purposes, the system does not boot to the OS until TPM randomization has successfully completed.


There is no impact to the functionality of the system. The message is for informational purposes only in this situation. If the TPM randomization step of the BIOS execution is not able to complete successfully, the BIOS causes the blade to reboot until the TPM randomization is successful. Note: If the system continually fails to boot due to this issue, you may have a hardware issue that requires F5 response to correct.


This particular instance of this message may occur after a fresh BIOS update to the system. If the initial boot after a BIOS install is interrupted, the subsequent boot may display this message in the log. The BIOS then causes the blade to reboot, allowing the TPM randomization step to complete.


Allow the blade to continue to boot. Once the BIOS has caused the blade to reboot, the condition clears itself and the message no longer appears as part of the boot process.

Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips