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From: Jorge Fernandez Monteagudo <jorgefm@cirsa.com>
To: "Valdis Klētnieks" <valdis.kletnieks@vt.edu>
Cc: "kernelnewbies@kernelnewbies.org" <kernelnewbies@kernelnewbies.org>
Subject: RE: Multi-touch USB weird response
Date: Fri, 30 Jul 2021 07:43:44 +0000	[thread overview]
Message-ID: <DB9PR10MB452278A4B97574092990F96EA1EC9@DB9PR10MB4522.EURPRD10.PROD.OUTLOOK.COM> (raw)

>> Event: time 1627381396.770902, type 4 (EV_MSC), code 5 (MSC_TIMESTAMP), value 35023100
>> Event: time 1627381396.770902, -------------- SYN_REPORT ------------
>> Event: time 1627381396.780891, type 4 (EV_MSC), code 5 (MSC_TIMESTAMP), value 35029400
>> Event: time 1627381396.780891, -------------- SYN_REPORT ------------
>> Event: time 1627381396.789895, type 4 (EV_MSC), code 5 (MSC_TIMESTAMP), value 35035700
>> Event: time 1627381396.789895, -------------- SYN_REPORT ------------
>> Event: time 1627381396.798896, type 4 (EV_MSC), code 5 (MSC_TIMESTAMP), value 35041900
>> Event: time 1627381396.798896, -------------- SYN_REPORT ------------
>> Event: time 1627381396.807889, type 4 (EV_MSC), code 5 (MSC_TIMESTAMP), value 35048200
>
>Looks like somebody's got a timer that pops every 0.01 seconds  or so. 
>(looks closer to 0.0098 or so actually)
>'git grep SYN_REPORT' tells me that these two files are a good place to start reading:
>
>Documentation/input/multi-touch-protocol.rst 
>Documentation/input/event-codes.rst 

Thanks for the info! Yes I would like to know who is sending these packages. I'm sniffing the USB  and I suspect the device in this edge situation is sending the same touch event every 8ms. Maybe a firmware bug...

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             reply	other threads:[~2021-07-30  7:49 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-30  7:43 Jorge Fernandez Monteagudo [this message]
  -- strict thread matches above, loose matches on Subject: below --
2021-07-29 12:57 Jorge Fernandez Monteagudo
2021-07-29 15:06 ` Valdis Klētnieks

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