Not able to change CPU on a full disk encrypted PVE installation

[jAston]

Hi all,

tried to replace a Ryzen 5 5500 CPU with a Ryzen 5 3600X on a full disk encrpyted PVE installation with ZFS / LUKS.

After changing the CPU I get

Press Y to reset fTPM, if you have Bitlocker or encryption-enabledsystem, the system will not boot without a recovery key. Press N to keep previous fTPM record and continue system boot. fTPM will NOT beenabled with new cpu unless fTPM is (previously initialised) you couldswap back to the old CPU to recover TPM related keys and data ?
YES / NO

I went with 'NO' but the system won't start. It queries the pre-boot authentication, but then just freezes, no ping (and also no dropbear connect btw) works.
Any ideas how to switch a CPU in that scenario?


The fTPM switch in the bios is enabled.
Board is an Asus Prime B450M-A II
proxmox-ve: 8.2.0 (running kernel: 6.8.12-2-pve)