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Reply To: Diagnostic query: Unexpected kernel panic on macOS Sequoia 15.1 after waking (1794706908)
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Background photolibraryd I/O or bluetoothd reconnection storms post-wake manifest as userspace CPU spikes (top -o cpu), not kernel assertions in AppleThunderboltNHI::handleInterrupt or IOPlatformPlugin::dispatchPolicy. The panic context IOPlatformPluginFamily + AppleThunderboltNHI specifically implicates the ACPI _WAK/_PTS method execution order or the Thunderbolt NHI mailbox doorbell register timeout (kNHITimeoutMs) during PCIe link retraining (L0s/L1 exit). Hardware Recovery Step: Disconnect all Thunderbolt/USB4 devices (including DisplayPort alt-mode docks) and measure wake latency via pmset -g log | grep -e "Wake Request" -e "DarkWake" -e "Full Wake" | tail -20; if stable, re-introduce the dock and capture a sysdiagnose immediately post-wake (sudo sysdiagnose -u) to inspect AppleThunderboltNHI register dumps (NHI_INT_STATUS, NHI_LINK_STATUS) for LINK_DOWN or FLR_TIMEOUT flags indicating a dock-side LTSSM failure.