I just retired my Viewsonic 19" CRT in favor of a Viewsonic VX2433WM. Looking in Xorg.0.log it's obviously recognized (as the following lines indicate):
(II) RADEON(0): Serial No: R4F100901594 (II) RADEON(0): Ranges: V min: 50 V max: 75 Hz, H min: 24 H max: 82 kHz, PixClock max 210 MHz (II) RADEON(0): Monitor name: VX2433wm However in Gnome's Display Preferences dialog, the monitor type shows up as "Unknown". What can be done about this? Additionally, a box saying "Unknown" (black text on cyan background) appears on my screen at the upper left corner. This wouldn't matter except that I like my Gnome panel at the top of the screen and the box blocks the Main Menu icon. The box appears to be a repeat of the Gnome Display Preferences dialog's "Unknown" monitor info. How can one nuke the box?