Re: panning screen in X...OK, I fixed it here's what and how: Gforce2 mx400,
The monitor/card combination works with windows xp and nvidia drivers between 50 and 120 Hz.
The monitor/card combination works with the open source "nv" driver at the same refresh range.
The xorg log (verbose 6) states that the EDID frequencies of the monitor are between negative one and zero Hz when using the "nvidia" driver.
The frequencies of the monitor cannot be between negative one and zero.
Therefore, it is most likely that the EDID frequencies are reported incorrectly.