I have a Dell XPS 15 laptop and I had my motherboard replaced. After that I am no longer able to dual-boot Windows and Ubuntu. Of course I disabled Secure boot in BIOS. The problem is:
- if I set SATA mode to RAID on, the GRUB bootloader loads correctly, but if I select Ubuntu (no matter which kernel or if it's recovery mode or not), I get the error:
Gave up waiting for root device. Common problems:
- Boot args (cat /proc/cmdline)
- Check rootdelay= (did the system wait long enough?)
- Missing modules (cat /proc/modules; ls /dev)
ALERT! /dev/disk/by-uuid/920903aa-762f-40d2-8126-87f4b0e6f975 does not exist. Dropping to a shell!
- if I try AHCI mode, I'm not even able to access GRUB boot menu, as I get Dell system check screen right away and after that it starts recovery process.
I'd really appreciate any help on this.