On Tue, Jan 02, 2018 at 02:15:10AM +0530, Manu Abraham wrote:
> This is what I understand:
>=20
> #1. The old machine was slow and the I/O on the cable was okay.
>=20
> #2. The faster userspace I/O on the newer system, caused a higher
> data rate on the cable, which directly affected crosstalk. This
> broke communication.
>=20
> #3. Now, the faster machine has a virtual machine, which slows down
> all I/O.  App->VM->OS->USB->serial in comparison to
> App->OS->USB->serial

Yes, that was my theory too; which I expressed far too briefly as
a "race condition".

There's also a different USB controller in the faster machine.

The key message; USB sometimes works, and depends on many factors.

We all too frequently black-box it in our minds.

--=20
James Cameron
http://quozl.netrek.org/
--=20
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