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Date:      Sat, 06 Feb 2021 10:33:01 +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@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D253288

            Bug ID: 253288
           Summary: hwpstate_intel: Wedges under any kind of load on
                    ThinkPad Carbon X1 Gen 8
           Product: Base System
           Version: 13.0-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: ltning-freebsd@anduin.net

Only workaround is to add
 hint.hwpstate_intel.0.disabled=3D1
to /boot/loader.conf, but this makes power consumption go through the roof =
and
generates a lot of dmesg warnings about overheating, suggesting the compute=
r be
switched off.

BIOS powersaving settings have no bearing on this problem.
The problem has existed since early 2020, and got significantly worse in the
Jan/Feb timeframe. However sporadic hangs with kernels from late 2019 have =
also
been observed.

Kernel/world version stable/13 106efdb060ae523a88caf5ddc3516500cf5b1d64

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