Multi-touch USB weird response
Valdis Kl=?utf-8?Q?=c4=93?=tnieks
valdis.kletnieks at vt.edu
Thu Jul 29 11:06:44 EDT 2021
On Thu, 29 Jul 2021 12:57:03 -0000, Jorge Fernandez Monteagudo said:
> 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
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