Looks to me that this is an issue with the hub in some way, rather than either
OS: Linux's support for USB is pretty mature.
David Gee
Gateshead
On 4 Sep 2020, at 12:40, Jim Lesurf <jcgl@xxxxxxxxxxxxxxx> wrote:
I also have 'unpredictable' problems wrt the mouse *and* keyboard, but in a
setup that differs from others. Maybe that may shed a light. Details
follow:
I'm still using the 'old' OS on my ARMX6 i.e. 5.23 18 Feb 18.
In my case I don't have a KVM. I connect mouse and keyboard via a passive
mechanical USB switch. This lets me choose between using the ARMX6 and a
Linux box.
Mouse and keyboard are combined using an externally powered USB hub
'before' the switch.
The keyboard is actually an old type so goes to the hub via an STL adaptor
which also has a mouse input (unusued).
Normally, it works fine. But every now and then I get no mouse, no
keyboard, or both. I can 'fix' this by unpowering and disconnecting the
hub, then repowereding and reconnecting it... usually.
FWIW as it boots up the Linux box usually reports detecting '2 mice', but
sometimes only 1 or none when the mouse isn't found. So there is a
'phantom' mouse added by the STL adaptor.
The keyboard is a superb 'left handed' one I've used for decades, so I wish
to keep on using it.
One more comment: I've noticed that the hub will draw power from the
connected computer if the computer is on but the hub's own PSU is
disconnected. So I need to also unplug the lead from hub to switch to
'break the chain'.
If anyone can combine that with the other reports it might shed some light.
Mostly, things work. But irritatingly often, they don't. This seems more
common first thing in the morning with the Linux box. Possibly because I do
*not* leave it powered all the time, and being off overnight is longer than
off periods during the day.
Jim
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