Bootloader parameters differ

Read and change your screen resolution in /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=auto

Change 'vbeinfo' to 'videoinfo'.

1024x768 (Sample)

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