A power spike broke the CPU temperature sensor on my motherboard. Memtest86+ runs fine. However, neither Linux nor Windows boots under default options. Windows simply shuts down during boot. Linux reports overheat during boot and shuts down in a few seconds. If I specify
thermal.nocrt=1 in the kernel boot options, Linux will boot and work correctly.
The CPU temperature reported by the motherboard sensor is -40℃ (negative) in BIOS and 216℃ (due to integer overflow) in Linux. The CPU temperature reported by the CPU's built-in sensor is 35℃, which is correct and consistent with the idle temperature before the power spike.
It is reasonable to believe that Windows shuts down also because it sees an extremely high temperature. In order to use Windows on this motherboard, I need to disable the software overheat protection. Essentially, I need the equivalent of
thermal.nocrt=1 in Windows. Is that possible?