11.01.2017 16:27, Matwey V. Kornilov пишет: > Hello, > > What is the proper way to output GRUB2 menu to serial rs232 console when > UEFI boot is used? I've copy-pasted GRUB_SERIAL_COMMAND="serial --unit=0 > --speed=115200" from Google because I didn't find anything else. It > doesn't work. > Now, reading grub sources, I see that the proper way should probably be > something like GRUB_SERIAL_COMMAND="serial efi0". >
This is platform dependent. --unit=0 refers to COM1 on PC BIOS platform. On EFI grub is using EFI Serial I/O Protocol and enumerates all handles with this protocol using efiXX names. Then there is USB serial driver, ARC and IEEE1275 where names are provided by firmware etc. > Could you please point me to proper documentation? > You are welcome to contribute to it. Adding template section for platform dependent serial information and filling it with information known so far will be excellent - then other may extend it. _______________________________________________ Help-grub mailing list [email protected] https://lists.gnu.org/mailman/listinfo/help-grub
