Still an issue for me (slightly)....gdm is not fixed (logging in), however upon logging in everything works, EXCEPT for applications such as r-base when plotting graphics, etc. The solution for me is to adjust gdm.conf through System->Administration->Login Window->Security->Configure X Server and adding "-dpi 96" to the end of the line "Command"
Still an issue for me (slightly)....gdm is not fixed (logging in), however upon logging in everything works, EXCEPT for applications such as r-base when plotting graphics, etc. The solution for me is to adjust gdm.conf through System- >Administration ->Login Window- >Security- >Configure X Server and adding "-dpi 96" to the end of the line "Command"