Why can't Ubuntu boot after installation on Lenovo s205?

Question

linux

Decided to install Ubuntu on a netbook. During the installation, I did a standard automatic installation with a complete disk cleanup. The installation is successful, it asks to reboot the system ... and after that the system does not boot. Instead, it displays information about the Realtek controller (it is the last in the device boot queue) and after a while comes to the Boot Menu. If I select my hard disk in it, then the history repeats itself and again shows information about the Realtek controller, that is, the hard disk is ignored as if it were completely empty. But if you try to install Ubuntu again, then during the installation it shows that Ubuntu is already installed. What could be the matter and why the OS does not start?

Answer 1

In general, I found a solution for the problem. Firstly, in addition to swap and ext4, it was also necessary to create an EFI partition. Secondly, after that it was necessary to wave a bit in the console. Found the solution here . I am copying it here.

• Create a live USB for Ubuntu 64-bit (eg with UNetBootin)
  
• While on the live USB installation, select "Do Something Else" and make /dev/sda1 an "EFI" partition with size 150MB. It must be a minimum of 100MB, recommended 200MB.
  
• Partition the rest of the drive however you want ( / and swap, / and /home and swap, whatever). Use primary partitions only (you might be able to get away with an extended for /home but I haven't tried it). This is my setup:
  /dev/sda1 150MB EFI
  /dev/sda2 20GB ext4 /
  /dev/sda3 5GB swap
  /dev/sda4 50GB ext4 /home
  
• Set the boot installer to install to /dev/sda1 (or your EFI partition #). Do not use /dev/sda.
  
• Install
  
• Pray
  
• Awesome, now Ubuntu is installed
  
• Restart your laptop, and boot back into the live USB
  
• Now, mount your EFI partition somewhere like this: "mount /dev/sda1 /mnt"
  
• Change directories into the "EFI" directory in the mounted folder "cd /mnt/EFI"
  
• Copy over the super secret important EFI files "cp -rfv ubuntu boot"
  
• CD into the boot directory "cd boot"
  
• Finally, move grubx64.efi to bootx64.efi "mv grubx64.efi bootx64.efi"
  
• Restart, and you should finally have a working Ubuntu/Xubuntu 14.04 on your dumbass Lenovo S205 computer! Yay!
  
• To get WiFi working, change boot order in Bios to boot from network first.
  

Answer 2

grub is not installed. It happens in bubuntu. Boot from livecd and restore grub

Answer 3

Possibly incorrect loader setting.
It is possible that the BIOS is MBR, not UEFI. Or vice versa.