In message , Java Jive
writes:
On 17/03/2019 11:24, Paul wrote:

J. P. Gilliver (John) wrote:

It showed exactly the same keypresses for "(" (shift-9) as for ")"
(shift-0), other than of course one had the 9 key and one the 0 key.
But I did notice that all the time it showed left Ctrl as pressed.
Weird thing is that actually tapping left ctrl had an effect (for
[]
appear), so it doesn't seem that the key is _actually_ stuck.

Tapping the left ctrl key a few times eventually made its
"pressedness" disappear from KeyBoardStateView - and hey presto, I
could then type ")" again!
This sounds like an Accessibility Feature.
One that "stretches" actuation of modifier keys,
so a disabled person can be just as productive
as everyone else.
In other words, *some* operation you are inadvertently
typing, keeps the "control" "jammed" for a period of
time, or until enough key presses have occurred to
cancel it.

Yes, I'd agree. The thread has got so long and convoluted that I can't
remember what JPG has already tried, but he might like to go into
Control Panel, Ease of Access to see if there's anything enabled there
that doesn't need to be - particularly Make the Keyboard Easier To
Use, Turn on Sticky Keys if enabled would be the first thing I'd turn off.
Thanks both. Yes, I've wondered about that - but, as Paul said in the
bit JJ snipped, "But your modifier stays asserted for too long, for that
to be a nice match for such a behavior." Yes, once it has "asserted", it
stays for several minutes - then goes (I suddenly find I can type ")"s
again). Besides, I can't think of an accessibility feature that'd
disable ")" but not "(".

I know the three accessibility features; the only one I have on isn't a
keyboard behaviour modifier (although it's name - "Toggle Keys" - sounds
like it should be); it's simply an audio feedback when you
engage/disengage a lock. I have it on mainly as an indication that I've
hit Caps Lock by accident; I don't really think it should be with the
other Accessibility features, but I suppose it had to go somewhere.

I don't have either Mouse Keys, Sticky Keys, or Filter Keys turned on. I
don't _think_ I trigger the keyboard way of turning them on;
irritatingly, the accessibility page doesn't tell you what they are, but
I know pressing shift five times is one of them because I occasionally
get a popup asking me if I wanted to do that. (Again irritatingly, that
popup includes a link "Go to the Ease of Access Centre to disable the
keyboard shortcut", but clicking it just takes you to the same settings
page, which doesn't have a disable-five-shifts-shortcut anywhere on it.)
--
J. P. Gilliver. UMRA: 1960/1985 MB++G()AL-IS-Ch++(p)Ar@T+H+Sh0!:`)DNAf

Imagine a world with no hypothetical situations...