You can simply add kernel parameter while booting. Either by tapping E or TAB 
and putting iomem=relaxed at the end of the linux line and then ENTER or CTRL+X 
to boot.

If you didnt protect the flash regions then you should be able to reflash 
core'ie with flashrom.

On October 31, 2019 6:58:00 AM UTC, Dalao <[email protected]> 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? 
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