How to fix plymouth bootup resolution...

After installed proprietary driver for NVidia or ATI, plymouth bootup screen has turned large and ugly. Here's how to fix it

1) Install v86d and hwinfo package

    $ sudo apt-get install v86d hwinfo

2) Check maximum resolution supported when running Plymouth

    $ sudo hwinfo --framebuffer

3) Edit the resolutions in the GRUB2 files

    $ sudo gedit /etc/default/grub

Assuming your monitor can support 1280x1024, otherwise change it to whatever resolution supported by your monitor
4) Change the text below

    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

to

    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash nomodeset video=uvesafb:mode_option=1280x1024-24,mtrr=3,scroll=ywrap"

then look for the text below

    #GRUB_GFXMODE=640x480

and change it to

    GRUB_GFXMODE=1280x1024

5) Edit another file

    $ sudo gedit /etc/initramfs-tools/modules

6) Add the following line at the end of the file

    uvesafb mode_option=1280x1024-24 mtrr=3 scroll=ywrap

7) Run

    $ echo FRAMEBUFFER=y | sudo tee /etc/initramfs-tools/conf.d/splash

8) Update Grub

    $ sudo update-grub2

9) Generate new splash screen

    $ sudo update-initramfs -u