http://bugzilla.opensuse.org/show_bug.cgi?id=1140464
http://bugzilla.opensuse.org/show_bug.cgi?id=1140464#c1
--- Comment #1 from Michael Chang
## Observation
On the serial terminal (SOL from IPMI) of an aarch64 machine I can see the following error messages immediately after the message `Welcome to GRUB!`:
``` error: serial port `com0' isn't found. error: terminal `serial' isn't found. error: terminal `serial' isn't found. ```
Yes, the aarch64 cpu doesn't have io ports to access ns8250/UART device, that's why having "com0 isn't found" as "com0" represents first ns8250 device found by grub and is default device name if omitted in the serial command. For aarch64, the efi serial input/output protocol is used to configure the serial device, and syntax could be looking like. GRUB_SERIAL_COMMAND="serial --unit=0 --speed=115200 --parity=no efi0" It depends on running UEFI firmware to work, if implemented. -- You are receiving this mail because: You are on the CC list for the bug.