I set up a Plasma desktop on an ArchLinux ARM installation on a Raspberry Pi 4 using the linux-aarch64 kernel. Everything worked fine, and I ws able to set up system monitor widgets for various sensors (CPU usage and temperature, memory usage). I then replace the kernel with linux-raspberrypi4, and after rebooting no sensors are available for the widgets, which now display nothing. I don't know what's the issue (maybe the rpi4 kernel lacks support for hardware sensors?); the only additional information that in my opinion might be relevant is that pacman removed the uboot-raspberrypi package when I installed linux-raspberrypi4 kernel, but I don't know if this is significant.
Any help is greatly appreciated, thanks.