The problem is fixed for me after an upgrade (not reinstall) to Dapper on my Toshiba R100. I think that should mean it really is fixed since the details of any X11 config files that might have hung around during the upgrade were irrelevant for the problem.
Also, the patch has now been committed to HEAD of the vesa driver: https://bugs.freedesktop.org/show_bug.cgi?id=2150 -- Problems with Trident CyberBlade XP4m32 on Toshiba Tecra M1 https://launchpad.net/bugs/13101 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
