Comment 71 for bug 506717

I tried this steps, and it isn't working for me:

"Step 1: we must edit the /etc/default/grub file.
Open a terminal and paste this:
         sudo gedit /etc/default/grub
On line #18, uncomment (uncomment = remove the "#" in front of the line( "#GRUB_GFXMODE=640x480" and change the resolution to whatever you want. Here is how it should look:
         GRUB_GFXMODE=1024x768
Step 2: edit the /etc/grub.d/00_header file.
         sudo gedit /etc/grub.d/00_header
And find the following line: "gfxmode=${GRUB_GFXMODE}" (it's line 103 on my computer) and under it, paste this:
         set gfxpayload=keep
Step 3: update Grub 2:
To update the GRUB, simply run the following command:
        sudo update-grub
Once you complete the above steps, restart the computer and you should see the nice Plymouth screen like in the screenshot in the beginning of the post."

I'm still seeing blue progress bars instead of a nice plymouth splash... If I revert the changes, do you guys think plymouth should work? Or what can I do to fix that?