R-01 screen won't turn on again after shutdown

[guu]

Risc-v operating system does not update

Notice for apt upgrade: apt upgrade on R01 os will mess up the content of extlinux.conf lead the boot failed so when this happens mount the sd card(with R01 os) on a PC (like Linux ) then go into the boot partition of the sd card you will see extlinux.conf extlinux.conf.cpi.bak replace extlinux.conf with extlinux.conf.cpi.bak the extlinux.conf.cpi.bak is for this kind of situation