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.
