On Sat, Sep 16, 2017 at 06:57:38PM +1000, Jonathan Gray wrote: > On Sat, Sep 16, 2017 at 10:03:58AM +0200, [email protected] wrote: > > >Synopsis: no CPU frequency scaling on Purism Librem 13v2 > > >Category: kern/amd64 > > >Environment: > > System : OpenBSD 6.2 > > Details : OpenBSD 6.2-beta (GENERIC.MP) #0: Fri Sep 15 23:36:30 > > CEST 2017 > > [email protected]:/usr/obj/GENERIC.MP > > > > Architecture: OpenBSD.amd64 > > Machine : amd64 > > >Description: > > There is no hw.setperf sysctl available to control the CPU speed > > > > >How-To-Repeat: > > Try to use apmd -A to save some battery life > > >Fix: > > unknown > > If vendor supplied acpi tables neglect to include _PSS in the aml you > won't get different cpu speed states on anything more recent than > a pentium m. > Hi,
On PureOS (the Debian derivative shipped by Purism) it's the intel_pstate driver that is used to control the CPU core speeds. Should I try to ask Purism to provide the proper _PSS objects in their BIOS, or is there hope to get P states support at some point? -- Matthieu Herrb
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