I tried to install Ubuntu on my laptop which uses Windows 10. I allocated some hard disk space for a Ubuntu partition and started to install Ubuntu 20.04 via Live USB. When the installation completed, it asked me to restart. However, when I restart my computer, firstly it showed me:
nouveau 0000:01:00.0: bus: MMID read of 00000000 FAULT at 6013d4
Then it directly boots into Windows and when I change the boot order, it simply opens GNU GRUB version 2.04. Does that mean Ubuntu is not installed or it uses older grub?