Zenbook Duo (2025)

[dingdong2367]

Hello,

I have an ASUS Zenbook Duo (2025) with BitLocker enabled. Everything was working fine until I updated the BIOS from version 309 to 310. After the update, I began seeing the BitLocker Recovery screen at boot. If I do a full shutdown, I can enter my BitLocker PIN and the system would work normally. If I do a restart, the Recovery screen would return.

I eventually had to disable BitLocker. When I attempted to re-enable it, I received the following error:

"No TCG event log is available.”

In Event Viewer: 

Event ID: 878

“BitLocker failed to validate secure boot state.
Error: No TCG event log is available.”

TPM.msc shows that the TPM is “ready to use.”
I’ve also noticed that the keyboard and touchpad started lagging, and the system takes longer to start up on the first boot.

Additionally, I’m not seeing PTT or any TPM-related settings in the BIOS to confirm that it’s enabled.

Thanks.

[amstel78]

Hello @Falcon_ASUS , just checking in to see if FW311 will be released soon. Please advise.

[Falcon_ASUS]

@amstel78 
I have confirmed with the relevant department again.
If there are any updates, I will get back to you immediately.
Sorry for any inconvenience it may be caused. 

[amstel78]

Hello @Falcon_ASUS, 

Have you received any updates from engineering? Many people, including myself, were expecting a firmware release to correct this issue in mid-December. We're now at the end of 2025 and it'd be nice if ASUS could provide us with an update that restores TPM functionality for security reasons.  We paid good money for these laptops. Prompt support is expected.  Thanks.

P.S. forgot to mention that FW310 also broke hibernation on Win11 build 26220.

[Falcon_ASUS]

@amstel78 
After confirmation with the relevant departments, the BIOS release has been delayed until mid-January 2026. We apologize for any inconvenience caused.