Date: Tue, 02 Jun 2026 13:11:54 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 295793] powerd is unaware of new CPPC and EPP controls Message-ID: <bug-295793-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=295793 Bug ID: 295793 Summary: powerd is unaware of new CPPC and EPP controls Product: Base System Version: 16.0-CURRENT Hardware: amd64 OS: Any Status: New Severity: Affects Some People Priority: --- Component: bin Assignee: bugs@FreeBSD.org Reporter: chris.torek@gmail.com The AMD-specific sys/x86/cpufreq/hwpstate_amd.c driver relatively recently grew some new CPPC and EPP controls and, as of commit https://cgit.freebsd.org/src/commit/?id=80d32a6b1d73e0c81303417fa280ac74ef1f417a, started setting CPPC to the highest supported "desired performance" value. On my desktop system this puts the system into high power mode (instead of automatic adaptive mode), which is kind of a waste of electricity and overheats my office. It's easy to override this with dev.hwpstate_amd.0.desired_performance=0 later of course, but it seems as though the general idea is to have powerd control this. Right now powerd has no concept of either dev.hwpstate_amd.0.desired_performance (setting this one sets all, even if there are 32 of them as on my desktop) or dev.hwpstate_amd.0.epp settings. If powerd is to control these AMD settings, it's going to need to learn the new sysctl knobs and how to use them. -- You are receiving this mail because: You are the assignee for the bug.home | help
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