With Manjaro 20.10 (XFCE) on a Pi4 (latest firmware) - I am trying to use the power LED functionality from the GPIO pin. This is tied to UART0 on pin 8.
Under PiOS the 'enable_uart=1" in config.txt enables the UART and drives the LED as expected.
The behavior I am getting with Manjaro is a kernel panic. I switched to kernel 5.4.80-1 and that had the same panic. Looking at the boot text UART0 seems to be enabled by default. But the LED does not come on.
Is there an alternative parameter I can add to config.txt to get the power LED to function from pin 8?
Is it possible UART0 is being enabled a second time, causing the kernel panic?