There seems to be an issue with nouveau driver. Edit the grub file by editing it with sudo access.

sudo vim /etc/default/grub 

Add nouveau.modeset=0 to the line that says GRUB_CMDLINE_LINUX="" so that it finally looks like this GRUB_CMDLINE_LINUX="nouveau.modeset=0"

Then run

sudo update-grub

Reboot after successfully updating grub.