I just tried mount -o remount,rw /dev/sda1. It says "mount: /run/miso/bootmnt: cannot remount /dev/sda1 read-write, is write protected".

The usb is created by using UsbWriter under Windows and write the manjaro-kde-18.1.2-191028-linux53.iso to the usb. It seems the above method does not work. How to modify its boot parameters?

2019年10月31日 15:21 来自 k4m1@protonmail.com:

Hi,

Afaik, you should be able to mount the live-boot usb as read/write after boot, and then modify
boot parameters from `/etc/boot/grub`
‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Thursday, October 31, 2019 8:58 AM, Dalao <dalao@tutanota.com> wrote:

Hi, I was using Seabios but recently switched to Tianocore. However, the tianocore can't boot my Manjaro linux distribution which was installed using the non-uefi method. So I want to flash back.

I only have a Manjaro live usb at hand. The tianecore can boot it. However this live usb is not set with iomem=relaxed, so I can't read or write the bios using flashrom.

I don't know how to set the live usb's grub settings because when it boots, it's already running commands. When using this tianocore with vgabios I can't see the grub screen when booting.

So how to set the live usb with iomem=relaxed?
Is there any live usb that already have the iomem=relaxed set?
Could anyone help me build a usb image dedicated for automatically recover flashing?