>>380
http://www.ubuntu.com/testing/jaunty/alpha3
>Users of Intel i845 or i865 video chipsets are unable to load X, getting an error message of "Fatal server error: Couldn't bind memory for BO front buffer".
>Users on these systems are advised to wait for a resolution to this bug before upgrading. 304871

なんでもmemory corruptionが原因とか…。