Black screen with white underscore after boot

I just booted my laptop and it shows this black screen with white underscore

it used to happen all the time but the gdm started right after it doesn’t.

Could we have those infos ?
They will be usefull to find and solve the problem.

  • Output of sudo inxi -FxxxZ use the “preformated text” button in the forum interface.
  • DE you are using.
  • If you installed another Display manager such as Lightdm or SDDM
  • The content of your /etc/gdm
  • If you changed the state of the gdm service