Re: RPi kernel upgrade breaks lirc

On Mon, Mar 18, 2019 at 01:43:11PM -0400, Ken Kayser wrote:
> I am new to lirc.  I installed it on a raspberry pi 3b+ running Raspbian
> GNU/Linux 9.8 (stretch) with the current production kernel 4.19.  I
> installed the current release of lirc, 0.9.4c.  I mad the required changes
> to config.txt and lirc_options.conf.  After rebooting, the device /dev/lirc0
> was missing and of course, lirc wouldn't run.  After much research and
> experimentation, I discovered that if I downgraded my kernel to 4.14.98, the
> /dev/lirc0 device magically reappeared and lirc runs fine. 

Do you still have dtoverlay=lirc-rpi in your config.txt?

In kernel 4.19 the downstream lirc-rpi driver was removed, you can use
the upstream gpio-ir-recv (dtoverlay=gpio-ir) and/or gpio-ir-tx
(dtoverlay=gpio-ir-tx) drivers from the RC subsystem instead.

These drivers will give you /dev/lircX devices as before plus the
gpio-ir-recv driver also supports in-kernel decoding (configured
with ir-keytable).

I'd also recommend checking out the Raspberry Pi forums, you'll find
more info about the details there.

so long,

Hias