Why does my screen blank out for the duration of the Grub boot menu?

Solution 1:

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

Solution 2:

I share the same video card.

Here is a solution:

1. Open up /etc/default/grub as 'root' (using sudo gedit /etc/default/grub, for example)
2. Uncomment the GRUB_GFXMODE line
3. Change the resolution to 800x600 (the lowest resolution for the video card)
4. Then type sudo update-grub

Here's what I'm talking about. This is an extract from /etc/default/grub:

 # The resolution used on graphical terminal 
 # note that you can use only modes which your graphic card supports via VBE  
 # you can see them in real GRUB with the command `vbeinfo' 
 # GRUB_GFXMODE=640x480

Uncomment the last line and change it to:

GRUB_GFXMODE=800X600