Date: Wed, 10 Jun 2026 18:32:51 +0000 From: bugzilla-noreply@freebsd.org To: acpi@FreeBSD.org Subject: [Bug 295941] Minisforum MS01 instability after 7b26353a59d6 hwpstate_intel: Disable package control on hybrid CPU Message-ID: <bug-295941-16045-NMRqtmOQ7l@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-295941-16045@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=295941 --- Comment #7 from Andrew Gallatin <gallatin@FreeBSD.org> --- (In reply to Adrian Chadd from comment #6) In all honesty, claude told me about it as I was bouncing ideas off of it. It seems like its not documented (checked volume 4 of the Intel SDM, where other MSRs are found), but is used in several projects. If you do a web search for for "PL4" or "icc_max" or intel msr 601h, you'll find about as much as I found out from claude. This knob is typically set by BIOS and sometimes tweaked by overclockers, and i suspect its not documented because setting it wrong can lead to instability. Eg, for *my* case, I'm not sure there is a lot to do here. I mostly opened this bug because you asked for it. -- You are receiving this mail because: You are the assignee for the bug.home | help
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