Spontaneous (?) loss of screen res options

[linux897]

Here's a weird one:
My Fedora 10 will no longer give screen res above 800x600 (60hz)
I routinely change screen res (due to having two different monitors) but I made no hardware changes immediately before the problem began. In other words: the hardware was the same as it had been the day before the problem arose.
I assumed a hardware fault, so I tried with XP. Weird: I can set higher resolutions there without problem.

Any idea why this happened and how I can fix it?

BTW, I've been a Linux user for some years, but I would describe my skill level as: 'novice.'

[fedsum]

open terminal & type

su -
system-config-display

try editing xorg.conf file with following commands

su -
cp /etc/X11/xorg.conf xorg.conf.backup
gedit /etc/X11/xorg.conf

it will look like

Section "Screen"

Identifier "Default Screen"

Device "Generic Video Card"

Monitor "Generic Monitor"

DefaultDepth 32

SubSection "Display"

Modes "1024x768"

EndSubSection

EndSection

change the mode.

[linux897]

Thanks for the suggestion.

It turns out that the problem was caused by a monitor extension lead. It's strange because I had not touched it between the last session when everything was working and the first 'problem' session.

Anyway, I took the extension lead out and Fedora now gives full range of resolutions...

Thanks again.