Grub background messed after installing a new Graphics card

Question

I had a nVidia Geforce 6200 128mb AGP Vga card before and ubuntu was working fine and I had customized my Grub boot menu background, Today I installed a new graphics card which is same as above but it is 256MB, now the graphics of the grub menu is lowered (low resolution and color depth), what should I do to fix it?

Answer 1

Determine Resolution to Use

First determine the video resolution you are able to use. Go to the grub menu and enter c to get a "grub" prompt. Then enter:

set pager=more
vbeinfo

and copy down the resolution you want to use. I suggest that you use the preferred mode listed at the end, if any.

You could also use xrandr to find your current mode. xrandr lists all modes and highlights the one in use.

will list your resolutions and highlight the one you are using.

---

Alter Grub Configuration

In the video Cako found yooyoomine suggests the following steps:

gksu gedit /etc/default/grub

Look for the line containing # GRUB_GFXMODE=800x600

Edit the line, removing the initial "#" so it is no longer a comment, and change the resolution to the one you picked above. Save the file when done.

Now enter:

gksu gedit /etc/grub.d/00_header

search for the following fragment (about half way down the file):

    cat << EOF
if loadfont `make_system_path_relative_to_its_root "${GRUB_FONT_PATH}"` ; then
  set gfxmode=${GRUB_GFXMODE}  

----->

  load_video
  insmod gfxterm
EOF

Where the line is enter the line:

set gfxpayload=keep 

and save this file.

Then run:

sudo update-grub

Then boot and test. If this disallows the normal use of grub you will have to either boot without seeing the menu, or use an Ubuntu Live CD, to unmake the changes.

Answer 2

This cause is for the bad nvidia driver.I had the same problem before saw this video: Video