@Steve Ambrose I always like to help :) but if you really killed your efs partitions there is no (known) way to fix that.
We could manually set Wifi and Bluetooth addresses but the modem config is encrypted by qcom.
fastboot==LK==emmc_appsboot.mbm
think about it ;)
but if it really fails(what it shouldn't) you still can force enter QHSUSB_DLOAD by shorting the hidden contacts and restore your phone using miflash. Also if you flash a wrong image - I mean really wrong like a boot.img or sth. else which the...
@redmaner lol TDB this s**t will be so deprecated :D
but yes everything except multiboot will work.
The only thing you have to take care of (if you install GRUB instead of sideloading it),
is that these files have to be in /sdcard/boot/grub (/mnt/media_rw/sdcard0 if u do this from Android)
and...
@graw2 do you have the latest modem?(or maybe a older one in case that's the problem). MIUI flashes modem, but official custom rom's don't.
Modem isn't just for RIL, it contains firmware for all sort of hardware.
@kront75 If you can still enter the bootloader, you can try to press volup and voldown same time when powering on the phone.
If not it'll get complicated :P
you can't do that via the kernel command line. you need to enable fbcon in the kernel config(drivers/video/console/) and you need a fbcon driver that is compatible with your hardware. (which we don't have)
GRUB is fully functional but what else do you want to do with GRUB? the whole purpose of grub is multiboot(even on computers). Also framebuffer console is a kernel feature not a bootloader one.