[Bug 253288] hwpstate_intel: Wedges under any kind of load on ThinkPad Carbon X1 Gen 8

[bugzilla-noreply at freebsd.org]

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

--- Comment #37 from Guido Kollerie <guido at kollerie.com> ---
(In reply to Dries Michiels from comment #36)

Forgot to clear the kernel buffer (dmesg -c), hence the message was from a
previous boot. Anyway, having cleared the kernel buffer and uninstalled
devcpu-data, the next reboot did NOT have the microcode update message anymore.

But even without the microcode update I am able to boot just fine. Running KDE
Plasma I generated some minor load by compiling a bit of Rust code (orjson lib)
while at the same time compiling NumPY/pandas (= lot's of C code): no system
freezes.

I guess hwpstate_intel just works on the Thinkpad T480.

% sysctl -a | grep dev.hwpstate_intel                                           
dev.hwpstate_intel.3.epp: 50
dev.hwpstate_intel.3.%parent: cpu3
dev.hwpstate_intel.3.%pnpinfo: 
dev.hwpstate_intel.3.%location: 
dev.hwpstate_intel.3.%driver: hwpstate_intel
dev.hwpstate_intel.3.%desc: Intel Speed Shift
dev.hwpstate_intel.2.epp: 50
dev.hwpstate_intel.2.%parent: cpu2
dev.hwpstate_intel.2.%pnpinfo: 
dev.hwpstate_intel.2.%location: 
dev.hwpstate_intel.2.%driver: hwpstate_intel
dev.hwpstate_intel.2.%desc: Intel Speed Shift
dev.hwpstate_intel.1.epp: 50
dev.hwpstate_intel.1.%parent: cpu1
dev.hwpstate_intel.1.%pnpinfo: 
dev.hwpstate_intel.1.%location: 
dev.hwpstate_intel.1.%driver: hwpstate_intel
dev.hwpstate_intel.1.%desc: Intel Speed Shift
dev.hwpstate_intel.0.epp: 50
dev.hwpstate_intel.0.%parent: cpu0
dev.hwpstate_intel.0.%pnpinfo: 
dev.hwpstate_intel.0.%location: 
dev.hwpstate_intel.0.%driver: hwpstate_intel
dev.hwpstate_intel.0.%desc: Intel Speed Shift
dev.hwpstate_intel.%parent: 


% dmesg | grep hwpstate_intel
hwpstate_intel0: <Intel Speed Shift> on cpu0
hwpstate_intel1: <Intel Speed Shift> on cpu1
hwpstate_intel2: <Intel Speed Shift> on cpu2
hwpstate_intel3: <Intel Speed Shift> on cpu3

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