rhkra...@gmail.com wrote: 
> On Saturday, on one of my computers, something was going on that caused my 
> insertion point to move, quite often, in an incorrect manner.
> 
> Often, on typing any letter, the insertion point would move behind the 
> character I just typed (such that the next character typed would appear in 
> front of the previous character).   This might have occurred for 20 to 50% of 
> the characters that I typed

> Less often (maybe 10% of the time that something went wrong (so maybe, 
> overall, 2.5 to 5% of the characters that I typed) maybe less), the IP moved 
> ahead 2 spaces so that a space would be skipped before the next character 
> typed.
> 
> Aside: The IP did stay in the same line I was typing (unless it was at the 
> end 
> or beginning of a line such that they "soft wrap" of the line would move it 
> to 
> the next or previous wrapped line).

Thanks for the clear problem description!

>    * I use the same keyboard on two computers via a KVM so I switched to the 
> other computer, the problem did not occur on the other computer. 
> 
> Aside: The irrelevant problem I mentioned is that quite some time ago 
> (several 
> years) I did something dumb while replacing a bad mouse (I didn't de-power) 
> the KVM) and damaged the mouse "input" to the KVM such that I no longer can 
> use a single mouse via the KVM, instead I have a separate mouse for each 
> computer, the mouse for the problem computer is furthest away from the 
> keyboard so it is impossible to accidentally make contact with it (and the 
> mouse pad is on a stable surface).

It is now highly likely that the problem is in the KVM.

>    * I switched back to the computer with the problem and the problem was 
> still present.
> 
> After some thought (and with crossed fingers), I rebooted that computer and 
> the 
> problem has not recurred since then.

... or in the connection between that computer and the KVM.

It is extremely unlikely to be malware.

-dsr-

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