Hi, today I realized USB ports acitvities between 3B and 4B are different.
I'm wondering those differences causes problems. So I'm thinking USB
ports activitiy on my Ras Pi 3B is wrong.
Both behaviors are from D- line (I think), USB 2.0 ports.
These are the behaviors from Ras Pi 3B.
And these are the behaviors from Ras Pi 4B.
4B's behavior seems to be more stable than that of 3B.
Please give me any advices, please!
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