Re: 2.6.22-rc[23]: blinking capslock led, stuck keys?

[Dmitry Torokhov]

On 6/4/07, Henrique de Moraes Holschuh <hmh@xxxxxxxxxx> wrote:
> On Mon, 04 Jun 2007, Dmitry Torokhov wrote:
> > >...but I'm not quite sure it is a buggy keyboard. It happens _way_ too
> > >often. Launch the line above and try to do some typing...
> >
> > This used to work fine on my box last time I tried it (the switch
> > itself is offloaded to a keventd and shoud not get in the way) but
> > then they push all kind of ACPI/SMM crap together with KBC so who
> > knows... I should try it again when I get home.
>
> Err... in laptops, almost *always* the KDC is emulated by the embedded
> controller, so I bet you're right on the money, there.  It is not "a buggy
> KDC", it is a buggy EC firmware and/or buggy SMBIOS which is a lot more
> common.
>
> And DoS'ing the EC is very high on the Don't Do That list on a laptop.  If
> the X60 is only losing keypresses and producing no bigger fireworks, that's
> outstanding behavior (as far as I trust ThinkPad firmware, anyway).
>
> So please throttle anything that might access the KDC way too much (as
> compared to normal keyboard operation by an user).

What would be reasonable throttling? Once every 100 ms?

--
Dmitry
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