Ctrl got stuck

[Tobias Polzin]

Hi Alexander, 

> It seems to appear more often under high load. But unfortunatly there is
not much we can do about it. 

Hm, usually my machine is not under "high load", but it could be short load
peak, like directly after switch from one desktop to another...

> Windows reports alt-gr as simultanious presses of ctrl and alt and we have
to 
> detect whether it is alt-gr or the keys are really pressed together. Under
heavy
> load the timeouts (and timestamps) of the events may differ between press
and 
>release events. That way you get a control press and an alt-gr release so
control
> gets stuck.

> the only solution is making the detection more robust.

I don´t know the implementation, but couldn´t it be a possibly approach to
improve the handling of mismatching release/press events? E.g. that a
"Alt-Gr release" releases "Ctrl", too. It seems to me, that there is
something else wrong, as there seem to be three states:

State green: Everything works fine

State red: Ctrl got stuck (possibly by pressing Alt-Gr under heavy load and
releasing without heavy load, or the other way round)

State yellow: Everything except Alt-Gr works fine (Can be reached from
"State red" with pressing/releasing Ctrl, Pressing Alt-Gr switches to "State
red")

Perhaps xfree get´s confused by a "AltGr" release without a press?

By the way: I wrote "Show Cursor" returns to "State green". Already opening
the menu of the tray-icon returns to "State green". Opening/Closing a new
window seems to be the point.

Regards, Tobias

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