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YouTube's ad problem just got worse: Users now seeing 90-second unskippable ads!
(www.androidauthority.com)
This is a most excellent place for technology news and articles.
CEC has been around for years. This is probably more an issue with the PC in question rather than the TV. TVs do an excellent job at turning themselves on when CEC is enabled. ๐
PCs have almost never supported CEC. PCs use a different signalling method to indicate to the monitor that they're on/off.