8 Years of Sleep-Induced Reboots: Decoding a Dell Inspiron Firmware Bug

For eight years, the author's Dell Inspiron 5567 randomly rebooted when put to sleep, across multiple operating systems. A deep dive into the firmware's source code revealed the culprit: the Southbridge's SPTS method. This method prematurely sent the sleep command before properly setting the sleep state, causing the reboots. The solution involved reordering code within SPTS to ensure the sleep state was correctly set before triggering the sleep. The article details the debugging process and explores the intricacies of ACPI sleep states.