On 2018-06-24 at 09:27, Richard Owlett wrote: > On 06/24/2018 08:16 AM, The Wanderer wrote: > >> On 2018-06-24 at 08:10, Richard Owlett wrote: >> >>> The discover(1) manpage does not describe output format/fields. >>> The relevant output line is:> Prolific Technology, Inc. PL25A1 Host-Host >>> Bridge unknown unknown >>> >>> There are two fields whose content is "unknown". >>> What are they? >>> TIA >> >> If you look at the "Examples" section of the man page, you'll see that >> the first example given includes four lines which consist *only* of >> "unknown unknown". >> >> From that, and from the information provided on the other lines from the >> output examples, I infer that the output format is "vendor model". >> (Those terms are listed under the third example, "Get model and vendor >> information by type".) >> >> In other words: this line represents a device of an unknown model, from >> an unknown vendor. >> >> (All of that is my inference and interpretation, not based on anything >> more solid. Even assuming I've got it right, I agree that the man page >> could be clearer about this.) > > Except [ <grin> &/or <groan> ], lsusb reports: >> Bus 004 Device 062: ID 067b:25a1 Prolific Technology, Inc. PL25A1 Host-Host >> Bridge > The "067b" is Vendor ID. > The "25a1" identifies a particular device of that manufacturer.
Yes; that's for the Prolific Technology device. As indicated by the fact that the man-page examples put "unknown unknown" on a separate line, I think that "unknown unknown" represents a completely separate device; I don't think it's related to the Prolific Technology device at all. I think the fact that they appeared on one line in your mail is an artifact of a line-wrapping mistake somewhere in the process. -- The Wanderer The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man. -- George Bernard Shaw
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