Messages in this thread | | | Date | Sat, 30 Dec 2006 08:20:56 +0100 | From | Rene Herman <> | Subject | Re: [BUG 2.6.20-rc2] atkbd.c: Spurious ACK |
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Dmitry Torokhov wrote:
> Somehow you get 2 ACks in a row, I wonder if on your boxes i8042 > pumps command and data into keyboard before i8042_interrupt gets a > chance to run. Could you please apply the debug patch below and tell > me the pattern of the data flow.
Yes, I believe the below trace confirms what you said? Both the ED and the 00/05 are sent before the first ACK gets back, by a 1 jiffie margin:
drivers/input/serio/i8042.c: ed -> i8042 (panic blink) [N] drivers/input/serio/i8042.c: 05 -> i8042 (panic blink) [N + 2] drivers/input/serio/i8042.c: fa <- i8042 (interrupt, 0, 1) [N + 3] drivers/input/serio/i8042.c: fa <- i8042 (interrupt, 0, 1) [N + 6] drivers/input/serio/i8042.c: ed -> i8042 (panic blink) [M] drivers/input/serio/i8042.c: 00 -> i8042 (panic blink) [M + 2] drivers/input/serio/i8042.c: fa <- i8042 (interrupt, 0, 1) [M + 3] drivers/input/serio/i8042.c: fa <- i8042 (interrupt, 0, 1) [M + 6]
The +2, +3 and +6 are constant. Forgot to pay attention to M - N, but I suppose it's not too important.
For me, the patch as you posted it is actually good to go. No more spurious ACK complaints...
Thanks, Rene.
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