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Problem booting windows 11: "tpm_passthrough: Could not guess TPM cancel


From: John Phone
Subject: Problem booting windows 11: "tpm_passthrough: Could not guess TPM cancel path"
Date: Sat, 25 Jan 2025 03:18:11 -0500


Hi I have a problem trying to boot Windows 11 using Qemu.

When I try to start qemu booting Windows 11 I get the error, "tpm_passthrough: Could not guess TPM cancel path"

qemu-system-x86_64 -enable-kvm -boot d -cdrom /home/mydrive/Downloads/Win11_24H2_EnglishInternational_x64.iso \
-tpmdev passthrough,id=tpm0,path=/dev/tpm0 -device tpm-tis,tpmdev=tpm0,cancel-path=/dev/null=on \
-m 4G -smp 4 -hda windows11_100G_jan242025.qcow2

I also tried "cancel-path=/tmp/foo-cancel"
Also changed permissions in /dev/tpm0 to 777.


qemu-system-x86_64 --version
QEMU emulator version 8.2.2 (Debian 1:8.2.2+ds-0ubuntu1.4)
Using Xubuntu 24 Lts.

Thanks

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