Precision 7780 TPM PCR7 woes

Question

Hi, there.

I just got a brand new precision 7780, and I upgraded the OS from Windows 11 Home, which came with the laptop, to Windows 11 Pro for Workstation.

I enabled the TPM and Secure Boot in UEFI BIOS Setup, and in Windows OS I enabled bitlocker for all installed NVMe disks. But in msinfo32.exe, it showed me that "PCR7 is not bindable" and "Reasons for failed automatic device encryption: PCR7 binding is not supported, Un-allowed DMA capable bus/device(s) detected.".

Please give some advice, thanks.

My laptop configuration:

CPU: i7-13850HX

RAM: 2x 32GB ECC DDR5 SODIMM 5200MT/s

GPU: RTX 4090 Laptop

OS: Windows 11 Pro for Workstation, 23H2, Build 22631.3007

heikkuri · Answer

Hi,

Please read this

https://www.dell.com/community/en/conversations/xps/device-encryption-missing-due-to-pcr7-configuration-binding-not-possible-error/65233d0cca0c8e4a1b6526b3?commentId=6524d4c56966bb7fe82e43b9

Capri_XXI · Answer

@heikkuri​ Thanks, but I have always kept VT-d enabled in BIOS,so I don't think it's because of this that 'PCR7 binding is impossible' appears on my platform. I tried to revert the BIOS Settings to the factory Settings (not the default settings), but the problem persisted.

Precision Mobile Workstations

Precision 7780 TPM PCR7 woes

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