LinuxCNC on Raspberry Pi 4

Maybe this may help I started Hal and issued
loadrt hal_pi_gpio dir=246244 exclude=63444491

With the following results

 

 

As far as I can see the problem arises from a bug on the 'cat /proc/cpuinfo' command
github.com/raspberrypi/linux/issues/2110

Unfortunately this command is used by the cpuinfo.c module which is called by the hal_pi_gpio module.

Maybe it could be solved with this variant:
cat /proc/device-tree/system/linux,revision | xxd -p
or
xxd -p /proc/device-tree/system/linux,revision

Can you try and tell me what he answers?

Tried what you suggested with the following output

 

Can cpuinfo.c be set so you use c03111

 

I have two rpi4 4gb one is Rev1.1 and the other Rev.1.2 both show correct Rev. # with 'cat /sys/firmware/devicetree/base/model' why not just look for this Rev.#/model and forget about other code such as c03111. This will work on 32bit and 64bit I have checked this on 32bit Raspbian.