Duca:
After reboot, my wired internet is also gone (no connection, network settings missing).
I tried to boot from a Live USB (created with Rufus) to fix it via chroot, but I can’t get the USB to boot . My PC only shows the GRUB menu of the installed system. I’ve changed boot order to USB first and also tried pressing ESC/F12, but it always loads the installed Manjaro, not the USB. The USB appears in the boot menu, but selecting it doesn’t work.
Most likely your USB key is not carrying a proper live ISO, Rufus might not be the best tool for it. If you only have a working Windoof you could try https://etcher.balena.io/
If you have access to a Linux system you could follow this guide:
Difficulty: ★★☆☆☆
This is a tutorial how to write an ISO file correctly to an USB stick.
Download the ISO and the checksum file.
First, verify the checksum:
sha256sum -c manjaro-de-version-date-kernel.iso.sha256
It should print a line which says “OK”.
If it’s not okay, it might be a bad download, so download it again.
Print out the checksum, we’ll need it later on:
sha256sum manjaro-de-version-date-kernel.iso
e839f496181159bfcfa81524a4c4ec839e4ee7ab2788db7467db15a7860d5be1 manja…