Problem with screen resolution after installing F12

[Greg Woods]

On Fri, 2009-12-04 at 10:51 -0600, Bruno Wolff III wrote:

> Probably your monitor isn't doing EDID correctly and the video drivers are
> playing things safe.

For the record, many older monitors (my desktop monitor at work is about
3 years old) appear not to do EDID at all. 

If it does do EDID properly, then you have to make sure that, at boot
time, it is connected, any KVM switch is pointing to the machine you are
booting, and the monitor is powered on.

> 
> When this happens you no longer get the mode lines you used to so that you
> can't just specify a larger resolution in xorg.conf, you also need to define
> and appropriate mode line. 

Even that doesn't work (at least for me), unless I also use the
"nomodeset" kernel boot parameter. 

--Greg