MappleCare Community
Reply To: Diagnostic query: Unexpected kernel panic on macOS Sequoia 15.1 after waking (1794664798)
Find answers from other Apple users or start a discussion about your device.
Home › Forums › Logic Pro, Final Cut Pro & Pro Apps › Diagnostic query: Unexpected kernel panic on macOS Sequoia 15.1 after waking (1794664798) › Reply To: Diagnostic query: Unexpected kernel panic on macOS Sequoia 15.1 after waking (1794664798)
Daniel HayesThe IOPlatformPluginFamily panic indicates the PMU (SMC) failed to negotiate display link training (LTTPR) over the Thunderbolt NHI within the kIOPMWakeFromSleep deadline, typically triggered by DisplayPort MST hub firmware race conditions on Sequoia 15.1. Extract the exact failure vector via log show --style syslog --predicate 'senderImagePath CONTAINS "IOPlatformPluginFamily" OR senderImagePath CONTAINS "AppleThunderboltNHI"' --last 24h | grep -i "assertion|timeout|0xe00002c1". Disable TCPKeepAliveDuringSleep and WakeOnLAN via pmset -g custom to reduce wake complexity, then test with a direct USB-C to DP cable (bypassing the dock) while forcing sudo pmset -a hibernatemode 25 to validate if the panic requires the NHI path. If stable, update the dock firmware via the vendor’s Windows/macOS utility or initiate a Thunderbolt bus reset using sudo pkill -9 thunderboltd followed by sudo kextunload -b com.apple.iokit.IOThunderboltFamily && sudo kextload -b com.apple.iokit.IOThunderboltFamily before sleep.