@TomF @photex @regehr another example, I have a super nice ASUS AMD phoenix APU based laptop, which has great battery life. However, one of AMDs newer power saving features, CPPC (broad strokes, adapting clocks with lower latency to get into low power states, faster), just does not work with my specific laptop, because ASUS haven't shipped an updated AGESA with a fix for the feature. (Unclear whether this is for good reason, but I assume it's just costly to re-validate and they don't want to)
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