Re: [BUG 2.6.20-rc2] atkbd.c: Spurious ACK

[Laurent Riffard]

Le 29.12.2006 06:54, Rene Herman a écrit :
> Dmitry Torokhov wrote:
>
> > On Friday 29 December 2006 00:17, Rene Herman wrote:
>
> > > Yes, I do have that in my tree. From the looks of it it's probably 
> > > not surprising, but the following gets me blinking leds without the 
> > > spurious ACK messages. Maybe still useful to know?
> > >
> > > diff --git a/drivers/input/serio/i8042.c b/drivers/input/serio/i8042.c
> > > index debe944..9c70d34 100644
> > > --- a/drivers/input/serio/i8042.c
> > > +++ b/drivers/input/serio/i8042.c
> > > @@ -371,7 +371,7 @@ static irqreturn_t i8042_interrupt(int i
> > >       if (unlikely(i8042_suppress_kbd_ack))
> > >           if (port_no == I8042_KBD_PORT_NO &&
> > >               (data == 0xfa || data == 0xfe)) {
> > > -            i8042_suppress_kbd_ack = 0;
> > > +            /* i8042_suppress_kbd_ack = 0; */
> > >               goto out;
> >
> > That would indicate that your keyboard generates multiple acks... I 
> > wonder
> > if you could boot with i8042.debug=1 and somehow capture the data flow
> > during panic (do you have a digital camera?).
>
> Not even an analog camera, but with or without the above, I get a single:
>
> " <7>drivers/input/serio/i8042.c: fa <- i8042 (interrupt, 0, 1) [ 902]"
>
> when it panics. During a full boot, I get:
>
> ===
[snip]
> ===
>
> Rene.

Dmitry, 

How about this output? (got this after a kernel panic)

====
drivers/input/serio/i8042.c: fa <- i8042 (interrupt, 0, 1) [35172]
drivers/input/serio/i8042.c: fa <- i8042 (interrupt, 0, 1) [35172]
atkbd.c: Spurious ACK on isa0060/serio0. Some program might be trying access hardware directly.
drivers/input/serio/i8042.c: fa <- i8042 (interrupt, 0, 1) [35296]
drivers/input/serio/i8042.c: fa <- i8042 (interrupt, 0, 1) [35297]
atkbd.c: Spurious ACK on isa0060/serio0. Some program might be trying access hardware directly.
drivers/input/serio/i8042.c: fa <- i8042 (interrupt, 0, 1) [35420]
drivers/input/serio/i8042.c: fa <- i8042 (interrupt, 0, 1) [35421]
atkbd.c: Spurious ACK on isa0060/serio0. Some program might be trying access hardware directly.
drivers/input/serio/i8042.c: fa <- i8042 (interrupt, 0, 1) [35544]
drivers/input/serio/i8042.c: fa <- i8042 (interrupt, 0, 1) [35545]
atkbd.c: Spurious ACK on isa0060/serio0. Some program might be trying access hardware directly.
===

~~
laurent

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