After installing both 18.04.3 and 19.10, stuck at login, returned to login screen

Question

I bought a computer a couple of months ago wasn't able to make it work so tried again, here is the spec:

• CPU: Intel Core i7 9700K
• Motherboard : Gigabyte Z390 UD
• SSD: Samsung SSD 1.0TB 970 EVO Plus NVMe M.2
• GPU: palit geforce rtx 2070

When trying to install I got these error messages:

• nouveau : unknown chipset
• PCIE bus error: severity=corrected, type physical layer

After installing I was able to reach the login screen, when I move my mouse over my user name to log in, mouse movements are choppy. and after i enter password (also choppy typing) I return to the login screen.

I've spent a lot of hours on this and no success.

Edit:

• tried to install for desktop 18.04.03 and 19.10
• I didn't enable HWE, just downloaded from the official website created ISO and tried to install
  • How do I enable HWE?

How do I make it work?

Answer 1

The same happened to me, that's a problem related to the NVIDIA Kernel Module failing with proprietary drivers. To solve it, do the following steps:

• At the login screen, press ctrl+alt+f2 and login with your name and password
• Type sudo nano /etc/default/grub (you can change nano to the text editor of your preference, but nano is Ubuntu's default text editor) to edit /etc/default/grub
• Change the line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" to GRUB_CMDLINE_LINUX_DEFAULT="nomodset"
• Update this grub edit with update grub
• Install lightdm using sudo apt-get install lightdm
• Reboot (you can shutdown throught the terminal with shutdown now)