If I've got X running on the openchrome driver, and I switch to another VT and then back to the openchrome VT, there are evenly spaced vertical lines running down the screen messing up the display. This is not a new problem; the openchrome driver has been unable to reconstitue the display properly after switching VTs and switching back for as long as I can remember.
*** This bug has been marked as a duplicate of bug 469504 ***