Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux-hwe-6.2 (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/2047692
Title:
"Disable RNG for all AMD fTPMs" breaks TPM on some Intel devices
Status in linux-hwe-6.2 package in Ubuntu:
Confirmed
Bug description:
6.2.0-39.40~22.04.1 includes upstream stable patchset 2023-10-10
(https://launchpad.net/bugs/2038969) with the TPM changes 'Disable RNG
for all AMD fTPMs' and 'Add a helper for checking hwrng enabled'.
This causes on some Intel devices that TPM does not work (in my case a
Gigabyte Brix GB-BSi5-1135G7) with the error
"
tpm_crb: probe of MSFT0101:00 failed with error 378
"
Upstream discussed this issue in
https://bugzilla.kernel.org/show_bug.cgi?id=217804 and a fix was
found:
https://github.com/torvalds/linux/commit/8f7f35e5aa6f2182eabcfa3abef4d898a48e9aa8
Full disclosure: I report this issue based only on above links. I did
not try to run my affected device with a patched kernel and switched
for the time being back to the HWE kernel 6.2.0-37. But the
deswcription of the issue is a very good fit to the behaviour I see
with the Gigabyte PC.
LSB release infos:
Distributor ID: Ubuntu
Description: Ubuntu 22.04.3 LTS
Release: 22.04
Codename: jammy
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