Roland Tollenaar wrote:
> Hi,
>
> I have understood that USB legacy set to be on in the BIOS is a
> potential cause for latency issues. Is that correct?
>
> I have it turned on due to the fact that I boot from USB. I'd like to
> know how severe the problems might be. Does anyone have experience with
> this?
I guess the answer depends on the BIOS implementation of the legacy
emulation. I suppose you can observe latencies around some tens of
microseconds.
That said:
- I really doubt that you need legacy USB emulation to boot from USB;
- in some cases, loading the Linux USB HCIs drivers is known to turn off
the legacy USB emulation.
--
Gilles Chanteperdrix.
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