cpu policy stuck at 'performance'

[xPol]

today, at boot, cpu  freq policy of my laptop is set to 'is set to
'performance' and cannot be changed.
As i try to switch to 'dynamic' (through kpowersave) i get ' cpu freq policy
dynamic could not be set'.
So my laptop gets hot, without any heavy processes running on it.

Any ideas about what has happened?

Thank you for your help

--
Pol
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