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Re: Grub2 UEFI boot and serial console output
From: |
Andrei Borzenkov |
Subject: |
Re: Grub2 UEFI boot and serial console output |
Date: |
Wed, 11 Jan 2017 19:45:21 +0300 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 |
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.
- Grub2 UEFI boot and serial console output, Matwey V. Kornilov, 2017/01/11
- Re: Grub2 UEFI boot and serial console output,
Andrei Borzenkov <=
- Re: Grub2 UEFI boot and serial console output, Matwey V. Kornilov, 2017/01/11
- Re: Grub2 UEFI boot and serial console output, Andrei Borzenkov, 2017/01/11
- Re: Grub2 UEFI boot and serial console output, Matwey V. Kornilov, 2017/01/13
- Re: Grub2 UEFI boot and serial console output, Andrei Borzenkov, 2017/01/13
- Re: Grub2 UEFI boot and serial console output, Matwey V. Kornilov, 2017/01/13
- Re: Grub2 UEFI boot and serial console output, Andrei Borzenkov, 2017/01/14
- Re: Grub2 UEFI boot and serial console output, Matwey V. Kornilov, 2017/01/16
- Re: Grub2 UEFI boot and serial console output, Matwey V. Kornilov, 2017/01/16
- Re: Grub2 UEFI boot and serial console output, Andrei Borzenkov, 2017/01/16
- Re: Grub2 UEFI boot and serial console output, Matwey V. Kornilov, 2017/01/16