Why am I having the most perfectly looking boot when I run from CD/USB but not from HD?

Question

I've read the lot of topics on plymouth and nvidia drivers.

However my question is focused on why the difference between live cd and installation?

By "the perfectly looking boot" I mean:

• the boot animation starts at the appropriate time (immediately)
• the bootscreen animation resolution matches my screen
• the transition between bootscreen and login/desktop is smooth
• i can start using my desktop with no lagging due to loading that is still being performed

Once I install Ubuntu on my hard drive though, some or all of the 4 points above are not true.

I've been having this issues since I started using Ubuntu extensively which was around version 10.04.

Answer 1

"the bootscreen animation resolution matches my screen"

That works only if you're using kernel modesetting, which means no proprietary graphics drivers (nvidia or amd fglrx)