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Date:      Tue, 09 Feb 2021 08:46:19 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 253288] hwpstate_intel: Wedges under any kind of load on ThinkPad Carbon X1 Gen 8
Message-ID:  <bug-253288-227-Eme7gzwrP8@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-253288-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253288

--- Comment #3 from Sreehari S <sreeharisreedev1@gmail.com> ---
This bug has also been affecting me on the ThinkPad X1 Carbon Gen7. From
digging around the codebase (I'm just a noob), it seems from my understanding
that it's something introduced in sys/x86/cpufreq/hwpstate_intel.c, which is
quite recent (commits starting on January 22, 2020, not merged into 12.x, and
few enough commits for me to keep track of: git log
sys/x86/cpufreq/hwpstate_intel.c). Once I get time I could try compiling each
of the significant revisions starting with the one just before the introduction
of the Speed Shift stuff and seeing which one breaks first. Could be wrong
about all of this though.

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