In kernel 4.6 and 4.7 holding down a button on an IR remote no longer
results in repeated key down events.
I've reproduced that issue on a Raspberry Pi B using a GPIO IR
receiver. Other systems seem to be affected as well, for
example Intel NUC with an ITE CIR receiver.
Bisecting points to this commit as a possible cause for that issue:
commit 078600f514a12fd763ac84c86af68ef5b5267563
Author: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx>
Date: Wed Mar 2 08:00:15 2016 -0300
[media] rc-core: allow calling rc_open with device not initialized
With upstream kernel 4.6.0 and 4.7.0 the ir-keytable output looks OK:
Found /sys/class/rc/rc0/ (/dev/input/event0) with:
Driver gpio-rc-recv, table rc-hauppauge
Supported protocols: NEC RC-5 RC-6 JVC SONY SANYO RC-5-SZ SHARP XMP other
Enabled protocols: RC-5
Name: gpio_ir_recv
bus: 25, vendor/product: 0001:0001, version: 0x0100
Repeat delay = 500 ms, repeat period = 125 ms
But running evtest (or ir-keytable -t) only shows EV_KEY events on
initial button down and on release:
Event: time 1469531035.490700, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531035.490700, type 1 (EV_KEY), code 2 (KEY_1), value 1
Event: time 1469531035.490700, -------------- EV_SYN ------------
Event: time 1469531035.603725, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531035.603725, -------------- EV_SYN ------------
Event: time 1469531035.716778, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531035.716778, -------------- EV_SYN ------------
Event: time 1469531035.829849, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531035.829849, -------------- EV_SYN ------------
Event: time 1469531035.942893, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531035.942893, -------------- EV_SYN ------------
Event: time 1469531036.055932, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531036.055932, -------------- EV_SYN ------------
Event: time 1469531036.169004, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531036.169004, -------------- EV_SYN ------------
Event: time 1469531036.282043, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531036.282043, -------------- EV_SYN ------------
Event: time 1469531036.395103, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531036.395103, -------------- EV_SYN ------------
Event: time 1469531036.508157, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531036.508157, -------------- EV_SYN ------------
Event: time 1469531036.621216, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531036.621216, -------------- EV_SYN ------------
Event: time 1469531036.734255, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531036.734255, -------------- EV_SYN ------------
Event: time 1469531036.875917, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531036.875917, -------------- EV_SYN ------------
Event: time 1469531037.125875, type 1 (EV_KEY), code 2 (KEY_1), value 0
Event: time 1469531037.125875, -------------- EV_SYN ------------
When reverting commit 078600f514a12fd763ac84c86af68ef5b5267563 in
kernel 4.6.0 evtest output is back to normal: EV_KEY events with
value 2 show up between button down and button up:
Event: time 1469531201.086823, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531201.086823, type 1 (EV_KEY), code 2 (KEY_1), value 1
Event: time 1469531201.086823, -------------- EV_SYN ------------
Event: time 1469531201.199789, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531201.199789, -------------- EV_SYN ------------
Event: time 1469531201.312818, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531201.312818, -------------- EV_SYN ------------
Event: time 1469531201.425846, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531201.425846, -------------- EV_SYN ------------
Event: time 1469531201.538852, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531201.538852, -------------- EV_SYN ------------
Event: time 1469531201.578497, type 1 (EV_KEY), code 2 (KEY_1), value 2
Event: time 1469531201.578497, -------------- EV_SYN ------------
Event: time 1469531201.651897, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531201.651897, -------------- EV_SYN ------------
Event: time 1469531201.708488, type 1 (EV_KEY), code 2 (KEY_1), value 2
Event: time 1469531201.708488, -------------- EV_SYN ------------
Event: time 1469531201.764901, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531201.764901, -------------- EV_SYN ------------
Event: time 1469531201.838497, type 1 (EV_KEY), code 2 (KEY_1), value 2
Event: time 1469531201.838497, -------------- EV_SYN ------------
Event: time 1469531201.877950, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531201.877950, -------------- EV_SYN ------------
Event: time 1469531201.968484, type 1 (EV_KEY), code 2 (KEY_1), value 2
Event: time 1469531201.968484, -------------- EV_SYN ------------
Event: time 1469531201.990939, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531201.990939, -------------- EV_SYN ------------
Event: time 1469531202.098497, type 1 (EV_KEY), code 2 (KEY_1), value 2
Event: time 1469531202.098497, -------------- EV_SYN ------------
Event: time 1469531202.128516, type 4 (EV_MSC), code 4 (MSC_SCAN), value 1e01
Event: time 1469531202.128516, -------------- EV_SYN ------------
Event: time 1469531202.228506, type 1 (EV_KEY), code 2 (KEY_1), value 2
Event: time 1469531202.228506, -------------- EV_SYN ------------
Event: time 1469531202.358563, type 1 (EV_KEY), code 2 (KEY_1), value 2
Event: time 1469531202.358563, -------------- EV_SYN ------------
Event: time 1469531202.378560, type 1 (EV_KEY), code 2 (KEY_1), value 0
Event: time 1469531202.378560, -------------- EV_SYN ------------
so long,
Hias
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