The help text for the kernel module surface_aggregator_registry says:
Device-registry for Surface System Aggregator Module (SSAM) devices. Provides a module and driver which act as a device-registry for SSAM client devices that cannot be detected automatically, e.g. via ACPI. Such devices are instead provided and managed via this registry. Devices provided via this registry are:
Platform profile (performance-/cooling-mode) device (5th- and later generations).
Battery/AC devices (7th-generation).
HID input devices (7th-generation).
This kernel module is needed on the Surface Laptop 4 for the keyboard.
The help text for the kernel module
surface_aggregator_registry
says:This kernel module is needed on the Surface Laptop 4 for the keyboard.
Bug-Ubuntu: https://launchpad.net/bugs/2007050 Bug-linux-surface: https://github.com/linux-surface/linux-surface/issues/839
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