I'm having the exact same problem, even after doing a full dist-upgrade c. 30 minutes ago. Bootsplash looks normal, I get the login "bongo" audio prompt - but after entering username/password, no more audio, no gnome splash - then after c. 30 seconds, a white/grey rectangle appears in the upper left corner.
This is in a clean Feisty Beta install with all recommended updates, no desktop effects. I am running the nVidia driver from the official repositories (in fact, I have nothing installed that's not from the official repositories). The odd thing is everything was working fine as of early yesterday (Wednesday 03/28/07) morning. I powered down to go to work, got home yesterday evening, powered up and this happened. Please let me know what other information might be helpful (that I can get from the console, as reovery mode is the only functional way I have of booting Feisty right now!). Thanks! -- after gnome login i get only a grey box in the top left corner of the screen https://launchpad.net/bugs/82709 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs