Locate you IR input device file

cat /proc/bus/input/devices

I: Bus=0019 Vendor=0001 Product=0001 Version=0100
N: Name=”sunxi-ir”
P: Phys=RemoteIR/input1
S: Sysfs=/devices/virtual/input/input2
U: Uniq=
H: Handlers=sysrq kbd event2 cpufreq_interactive
B: PROP=0
B: EV=100003
B: KEY=ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff ffffffff fffffffe

Along with other device file you will get IR device file info as above (If it is supported). From above information you will know that event2 is your IR device file.

evtest /dev/input/event2

Sometime if things doesn’t work out as expected you can reinsert the module:

rmmod sunxi_ir_rx
insmod /system/vendor/modules/sunxi-ir-rx.ko
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