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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
There is an out of tree kernel module doing just that (integrating ddc/ci, the control channel for external monitor*, with the backlight system). And someone is working on upstreaming it
I find this script useful for backlight: https://github.com/p-kolacz/.dotfiles/blob/master/bin/backlight
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