Good Morning, I have an arm64 rk3399-rockpro64 that I am booting from u-boot to grub-efi. The boot path works fine, but I am unable to get the serial terminal working.
I get the following output only: error: serial port `com2' isn't found. error: terminal `serial' isn't found. error: terminal `serial' isn't found. EFI stub: Booting Linux Kernel... EFI stub: EFI_RNG_PROTOCOL unavailable, no randomness supplied EFI stub: ERROR: Could not determine UEFI Secure Boot status. EFI stub: Using DTB from configuration table EFI stub: Exiting boot services and installing virtual address map... [ 0.000000] Booting Linux on physical CPU 0x0000000000 [0x410fd034] Here is my grub config, including the kernel command line showing a working serial output: GRUB_CMDLINE_LINUX_DEFAULT="earlycon=uart8250,mmio32,0xff1a0000 console=tty0 console=ttyS2,1500000n8" GRUB_TERMINAL="console serial" GRUB_SERIAL_COMMAND="serial --speed=1500000 --unit=2 --word=8 --parity=no --stop=1" I see I the console errors on the serial connection passed from u-boot, but I can't figure out how to get a full console there. Any suggestions would be greatly appreciated. Thanks, Peter
