Ubuntu – Why does the screen blank out for the duration of the Grub boot menu


Upon booting, when I should see the GRUB menu, my monitor simply says: "No optimum mode. Recommended mode: 1600*1200". If I wait for a short while, Ubuntu starts to boot and it reaches the desktop.

So I guess there is no video signal during that time, there's the grub menu but I cant see it and after the wait time everything is fine. I have the same problem when I log out for a short moment, before the log in screen is reached. and this also happens when i shut down ubuntu.

The VGA is an onboard NVIDIA GeForce 7025.

Best Answer

The graphical Grub menu does not appear to be compatible with your video card. So let's switch to a text menu instead.

  1. Open the terminal with Ctrl+Alt+T
  2. Paste the below, and enter your password when asked:

    sudo sed -i -e 's/#GRUB_TERMINAL/GRUB_TERMINAL/g' /etc/default/grub
  3. Then type sudo update-grub

  4. Reboot and hopefully you get a text menu instead of the screen just blanking out.

Explanation: Here, sed simply uncomments the GRUB_TERMINAL=console line, forcing text mode