I'm attaching some notes I took while trying to debug this problem. They are very sketchy, and I haven't got round to finding out what the origin of the problem is, but perhaps they might make sense to someone.
** Attachment added: "Debugging notes" http://librarian.launchpad.net/6820886/NOTES -- Edgy X vesa driver blank screen on Toshiba Portege R100 https://launchpad.net/bugs/68814 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
