I have the same problem on my Hypersonic laptop (P4-3.4GHz, ATI Mobility Radeon 9700, 1GB RAM). It occurs under both Dapper Flight 5 and Dapper Flight 6. X appears to start normally, however I get a blank, brown screen with a movable pointer and no Gnome splash screen. Ctrl-Alt-Bksp does nothing. If I switch to a terminal and sudo kill X, then X comes back and sometimes stops at the brown screen and sometimes shows the ubuntu background and the Gnome splash screen, but then stops before Gnome finishes loading.
** Changed in: meta-gnome2 gnome (Ubuntu) Status: Unconfirmed => Confirmed -- Toshiba M3, Breezy: Gnome hangs after log-in https://launchpad.net/malone/bugs/34866 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs