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Reply To: Diagnostic query: Unexpected kernel panic on macOS Sequoia 15.1 after waking (1794661940)
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Home › Forums › iPhone & iOS Help Desk › Diagnostic query: Unexpected kernel panic on macOS Sequoia 15.1 after waking (1794661940) › Reply To: Diagnostic query: Unexpected kernel panic on macOS Sequoia 15.1 after waking (1794661940)
Claire BennettThe AppleThunderboltNHI assertion often stems from a failed USB-PD contract renegotiation during wake, where the dock’s firmware presents an invalid PDO (Power Data Object) causing the NHI controller to assert. Verify the active PD contract with ioreg -r -c AppleThunderboltNHI | grep -A5 "PDO" immediately after wake; if kIOThunderboltPDInvalid appears, force a deep SMC/PD controller reset by disconnecting all power/Thunderbolt cables for 60 seconds. On Apple Silicon, this also clears the embedded controller’s stale dock topology cache that survives NVRAM resets.