Originally Posted by jefro
Are you encrypting the disks during install?
Does the live cd work correctly?
Did you test download of iso?
No encryption (Auto login), ISO works (very slow burn) and yes-no errors detected.
With that being said, I will still get that annoying piix4 error even with a live cd boot. I have always had that issue (piix4) but it never cost me any performance issues like this before and was "fixable". 10.04LTS had the same issues as this package (12.04), though CentOS and Fedora only had the piix4 error.
I start to wonder if it's a 780i chipset issue that just likes to fight with Linux distros... ...in particular, Gnome based.