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SubjectRe: Input issues - key down with no key up
On Wed, Aug 20, 2003 at 11:58:12PM +0100, Jamie Lokier wrote:

> Synthesising an UP event after receiving a DOWN from the keyboard, and
> nothing else for that key for > (repeat delay + a bit more) time looks
> like a good plan to me, UNLESS there are keys which do report UP when
> the key is released (as opposed to immediately after the DOWN), and
> also don't repeat.

And there are keyboards with such keys.

> Unrelated: I have some messages from my laptop, Toshiba Satellite 4070CDT:
>
> atkbd.c: Unknown key (set 2, scancode 0x94, in isa0060/serio0) pressed.
> atkbd.c: Unknown key (set 2, scancode 0xbf, in isa0060/serio0) pressed.
> atkbd.c: Unknown key (set 2, scancode 0xa1, in isa0060/serio0) pressed.

Do you know what keystrokes cause this?

It looks like this cannot come from i8042_unxlate_table[].
Do you set i8042_direct?

Vojtech, this sounds like a bug in i8042.c:
We do
if (data > 0x7f) {
index = (data & 0x7f);
if (test_and_clear_bit(index, i8042_unxlate_seen)) {
data = i8042_unxlate_table[data & 0x7f];
}
} else {
data = i8042_unxlate_table[data];
}
serio_interrupt(&i8042_kbd_port, data, dfl, regs);

In other words, the keyboard sends something in translated Set 2,
but we fake that it is untranslated, unless it was
a key release and we didnt know that the key was down.
Thus, atkbd.c gets a mixture of untranslated and translated codes.

Andries

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