Finally back from my extended trip. The problem is still there after upgrading to
coreboot 4.8.1-Purism-3; cannot yet confirm the ‘statistics’ by others.
As far as I can tell,
this issue is spread over (at least) three threads; so I’ll link here to the other ones …
https://forums.puri.sm/t/librem-15-pureos-becomes-sluggish-after-closing-opening-lid
https://forums.puri.sm/t/purism-power-optimisations-service-fails-after-recent-update
https://forums.puri.sm/t/cpu-fan-stuck-at-high-speed-sometimes/
I would still hope that someone from puri.sm connects these threads and provides
official updates.
I can only report that I added the proprietory Intel firmware, but this had no effect on
the frozen frequency / fan full blast issue.
Best,
Stefan