Default driver? Hardly, the default for your setup is vesa, not the ATI binary blob.
** Changed in: linux-restricted-modules-2.6.20 (Ubuntu) Sourcepackagename: xorg => linux-restricted-modules-2.6.20 -- dual head ATI radeon X1550 has random and frequent resolution changes on DVI output https://launchpad.net/bugs/94214 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
