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A comment on USB4 Specification. Parent comment

Re:USB4 Specification by gumby on Wednesday September 04, 2019 @01:37AM (#20874311)
Only in the power case -- how can it know that you didn't intend to use USB 1? It wouldn't be able to tell what the other side is capable of in that case, hence the fallback.
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Re:USB4 Specification by bonzini on Wednesday September 04, 2019 @02:45AM (#20874597)
It could know via USB descriptors, and match the device capabilities from the descriptors against what the cable allows.
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