Raymond Chen reveals that holding a PC's power button for 12 seconds forces a hardware-level shutdown without OS notification, while 8 seconds triggers a Windows kernel dump for error reporting. These LPBH (long power button hold) dumps are sent to Microsoft, with black-screen variants routed to a special analysis team.
Author Thom Holwerda notes a discrepancy: most motherboards force shutdown at 4-5 seconds, not 12, per their own microcontroller implementations rather than the ATX specification. This raises questions about why Windows expects a 12-second hold.
The mystery persists: does Windows adapt its kernel-dump timing based on motherboard firmware via chipset drivers? Raymond Chen, who analyzes these dumps, confirms they arrive regularly, suggesting many systems do meet the longer threshold despite typical hardware behavior.
Source: Hacker News · Summarized by HeadlinesBriefing