grub2 - How to properly reset all grub/boot settings?

Several symptoms:

• No splash screen, just a console


• No TTYs available (CTRL+ALT+F1 etc..), just random coloured bars

A while ago, I've used a tutorial to fix Plymouth bootsplash resolution and changed settings I don't quite recall now. What is the proper way to reinstall and reset Plymouth and/or GRUB settings to see if removing my modifications will fix the boot to some acceptable level?

NB: I've updated to 11.10-beta hoping it would fix the problem, but this originally happened on 11.04

Edit: I think the tutorial I followed is this one but I'm not 100% sure. Also, I think the things mentioned in the tutorial are not the only ones I've changed, since I've tried to fix this when it first happened, so I may have messed up other stuff too. This is why I'm looking for a "reset all" solution.

Did you try undoing each of the steps in that tutorial?

Like, (Note: This is just an undoing of whatever that was done in that tutorial)

1. sudo apt-get remove v86d




2. editing the /etc/default/grub file and

   
   
   
   
   
   

   1. changing the line 9 which would now read GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset video=uvesafb:mode_option=1280x1024-24,mtrr=3,scroll=ywrap" back to GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

   
   

   2. and line 18 which would now read - GRUB_GFXMODE=1280x1024 back to GRUB_GFXMODE=1280x1024.

   
   

  3. gksudo gedit /etc/initramfs-tools/modules and remove the last line reading uvesafb mode_option=1280x1024-24 mtrr=3 scroll=ywrap

  4. Remove the line that reads FRAMEBUFFER=y in the /etc/initramfs-tools/conf.d/splash file

  5. Then run sudo update-grub2

  6. Then run sudo update-initramfs -u

  7. Then reboot