Intel ME Interface missing from sysfs

[philipanda]

Component

Dasharo firmware

Device

NovaCustom V54 14th Gen

Dasharo version

v0.9.1-rc1

Dasharo Tools Suite version

No response

Test case ID

MNE006.001

Brief summary

Can't check ME version because ME interface is missing from sysfs in ubuntu 24.04

How reproducible

100%

How to reproduce

1. Make sure Intel ME is enabled in setup
2. boot to ubuntu and run sudo cat /sys/class/mei/mei0/fw_ver

Expected behavior

Example output:

0:16.0.15.1735 0:16.0.15.1735 0:16.0.15.1723

Actual behavior

root@3mdeb:~# cat /sys/class/mei/mei0/fw_ver
cat: /sys/class/mei/mei0/fw_ver: No such file or directory
root@3mdeb:~# ls /sys/class/mei
ls: cannot access '/sys/class/mei': No such file or directory
root@3mdeb:~#

Screenshots

No response

Additional context

No response

Solutions you've tried

No response

[mkopec]

@philipandag can you paste output of dmesg here? Hard to say why Linux isn't creating these devnodes

[mkopec]

ah, forgot to remove CONFIG_DISABLE_HECI1_AT_PRE_BOOT=y from the config

[mkopec]

fixed by https://github.com/Dasharo/coreboot/pull/548/commits/058ae7afed1319c3fa54859e1ff4808ffe3dcb6a

[philipanda]

The issue is fixed in RC4, the fw_version can be read.