For a little while now (6 years) my Lenovo z70 laptop was dual booted with having Windows 10 on one partition and Linux Ubuntu 16.04 on another partion.
Unfortunately, I had to upgrade to 18.04 since 16.04 support ended. I succesfully installed 18.04 on my laptop.
Then, I started upgrading to Linux Ubuntu 20.04. During the final steps of installation the NetworkManager stopped and the installation hung. It was hanging for a little while and I had to power off. So, I powered off midway through installation to discover that i can no longer boot into Linux.
Well, kind of. It looks like when I restart I still get to the boot select screen with my previous options:
GNU GRUB version 2.06
*Ubuntu
Advanced options for Ubuntu
Windows UEFI recovery bootmfw.efi
Windows Boot UEFI recovery
EFI/Ubuntu/fwupx64.efi
EFI/Ubuntu/mmx64.efi
Windows UEFI recovery LrsBootmgr.efi
Windows Boot Manager (on /dev/sda2)
UEFI Firmware Settings
Selecting Ubuntu, as I have before, now goes into infinitely waiting loading screen with "Lenovo" logo.
So, that goes nowhere. Selecting "Advanced options for Ubuntu" gives the following options:
Ubuntu, with Linux 5.4.0-137-generic
Ubuntu, with Linux 5.4.0-137-generic (recovery mode)
Ubuntu, with Linux 4.15.0-202-generic
Ubuntu, with Linux 4.15.0-202-generic (recovery mode)
Ubuntu, with Linux 4.15.0-142-generic
Ubuntu, with Linux 4.15.0-142-generic (recovery mode)
Ubuntu, with Linux 4.15.0-66-generic
Ubuntu, with Linux 4.15.0-66-generic (recovery mode)
So, selecting either of the 2 first options (with 5.4.0-137), also hangs after reaching [ 0.800529] --- [ end Kernel panic -- not syncing: VFS: Unable to mount root fs on unknown-block(0,0) ]---
Selecting either of the remaining options actually does go far enough and I reach the "Recovery Menu (filesystem state: read-only)"
This menu has options, which I also all tried.
- resume (Resume normal boot) -> hangs.
- Clean (Try to make free space) -> I have free space
- Dpkg (repair broken packages) -> tool runs, but when trying to boot
it still hangs.
- failesafeX (Run in fail safe graphic mode) -> terminates with error
and brings me back to Recovery Menu.
- fsck (Check all file systems) -> runs but terminates prematurely and
boot still hangs.
- grub (update grub bootloader) -> updated, but booting still hangs.
- network (Enable networking) -> have not tried this.
- root (drop to root shell prompt) -> this works and i can enter the
root shell. There i can verify my files are there. I think if someone
can direct me how to either re-install 20.04 or just revert to 18.04
it would be great. With root shell i verified that I did get 20.04.5
LTS installed.
Please help me get back into being able to boot my Linux OS. Thanks!
