Raspberry Pi 4 Tutorial - fatal error

Hello David
I've run into the very same issue today.
Raspberry Pi 4B boots into the graphical UI but mouse and keyboard will not work.
I am using the latest image from here: www.linuxcnc.org/iso/linuxcnc-2.8.0-pi4.zip .

Many thanks for any advice, Gero

Update: it seems to be related only to 8GB. I tried it with a 4GB RPI and it works well. I think its a kernel issue in this built.

Same here, gui but no usb mouse and keyboard

Thanks for the tutorial. I followed the tutorial in headless mode (ssh); ran into a problem. After building the preempt rt kernel, DEPMOD reported a different version (I didn't write it down). After installation and subsequent edit of the /boot/cmdline.txt to append the text, I did reboot, but the device is no longer accessible to the network - not via wifi and not via ethernet. Suggestions?
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on edit:
Obtained a micro hdmi adapter so as to view the boot process, the device shuts down on a kernel panic.

I'm also getting this same issue of no USB mouse / keyboard (all types) with my 8Gb version - straight from fresh SD card image - linuxcnc-2.8.0-pi4.img

Any ideas of how to fix?

This is not a power issue (that has been previously noted), running of 7A SMPS and also tried with 20Ahr battery pack with same result.

When plugging in usb mouse, the red sensor led lights up briefly before going out (all 4 usb ports).

Unable to set up remote access so impossible to generate any kind of dump.

There are some ideas here, but they rely on SSH being available.

Do you have the same problem with a standard Raspbian install, or is it just the LinuxCNC image?

i've made a separate thread to avoid clogging this one up

forum.linuxcnc.org/9-installing-linuxcnc...-on-raspberry-pi-8gb