CPU thermal emergency shutdown at 97°C triggered by dust-clogged heatsink after 18 months without cleaning, causing ACPI THERMTRIP on CPU Package thermal zone.
The CPU hit its thermal emergency limit and ACPI triggered an immediate hardware poweroff to prevent damage.
91% confidence. ACPI THERMTRIP with all-core thermal uniformity is nearly unambiguous. Would be 95%+ if we had lm-sensors historical data to confirm the gradual temperature rise trend.
CPU Package temp: 85°C (throttle threshold: 90°C)
Temperature approaching throttle limit during moderate load
CPU thermal throttling engaged - freq reduced 3800→2400 MHz
CPU forced to reduce speed to manage heat
ACPI: Critical threshold crossed: 95°C
ACPI initiates controlled shutdown sequence
ACPI THERMTRIP - hardware emergency poweroff at 97°C
Emergency poweroff - no clean shutdown, journal may be incomplete
journalweight94%
ACPI: Critical trip point reached. CPU Pkg: 97°CACPI thermal zone exceeded critical limit - hardware forced immediate poweroff
thermalweight88%
coretemp: Core 0: 96°C, Core 1: 97°C, Core 2: 95°C, Core 3: 94°CAll cores uniformly hot - heatsink issue rather than single-core workload spike
journalweight83%
CPU throttling: P-state 0 → P-state 8 (3800MHz → 2400MHz) for 8 minutesExtended throttling with still-rising temps indicates cooling system failure