I found that during upgrade process from dapper to edgy my /etc/usplash.conf was overwritten and got the wrong resolution, ie 1024x768 instead of 1024x600. Modified it with right resolution for my screen and boot is now speedy as it was before and the splash screen is displayed right.
-- no boot splash and very slow booting https://launchpad.net/bugs/61711 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs