To set IR on my clean Raspberry Pi 4, I am following the instructions at https://learn.pi-supply.com/make/ir-remote-control-support-on-raspbian-buster-justboom/.
One step at the beginning, even before installing lirc package, is to install and run ir-keytable:
$ sudo apt install ir-keytable
$ sudo ir-keytable
This command shows that my driver is gpio_ir_recv and the device is /dev/lirc1. Perfect.
Next, I run the command to test receiving IR signals:
$ sudo ir-keytable -c -p all -t
However, this command quits as soon as it is run. There are no new messages in /var/log/ folder either.
Wondering why this command would simply quit.
Note that lirc package as not yet been installed. As per the article, this step comes later.