Hello Everyone,
I'm having an issue with Dual CRT Monitors after installing Fedora 12. I have extended the desktop so I can use both monitors. I have my rig setup using a KVM Switch to 1 ATI Radeon 9600XT video card.

On one of those monitors my resolution is limited to 800 x 600, while the other I have higher resolutions to choose from.

I went to the Display Properties and noticed that the monitor with limited resolution (800 x 600) is showing up as UNKNOWN and I think this maybe the problem. I'm not sure who makes this monitor... no manufacture labels to look at really...its surely not a name brand monitor.....this monitor I picked up from someone a while back.

When I ran Windows XP on this box I didn't have any resolutions problems..when I extended the desktop....so I'm wondering if anyone would have any ideas on how to troubleshoot this.

Thanks

Try creating an xorg.conf file:
https://fedoraproject.org/wiki/How_to_create_xorg.conf

Once this file is created, you can manually add higher resolutions and access them from the display panel (or just explicitly specify those resolutions so they're the only option, which is what I usually do).

Also, sorry, I should have added that you can find some instructions for editing xorg.conf at http://www.x.org/archive/X11R6.8.0/doc/xorg.conf.5.html

Thanks for the Help...I did some modifying to the Xorg.conf file but wasn't able to get the resolution higher than 800 x 600 on my second monitor. Here is my Xorg.conf file:


Section "ServerLayout"
Identifier "single head configuration"
Screen 0 "Screen0" 0 0
Screen 1 "Screen1" RightOf "Screen0"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection

Section "InputDevice"

# keyboard added by system-config-display
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105+inet"
Option "XkbLayout" "us"
EndSection

Section "Monitor"
Identifier "Monitor1"
VendorName "Monitor Vendor"
ModelName "Monitor 1024x768"
HorizSync 31.5 - 61.0
VertRefresh 50.0 - 75.0
Option "dpms"
EndSection

Section "Monitor"
Identifier "Monitor2"
VendorName "Monitor Vendor"
ModelName "Monitor 1024x768"
HorizSync 31.5 - 61.0
VertRefresh 50.0 - 75.0
Option "dpms"
EndSection



Section "Device"
Identifier "Videocard0"
Driver "radeon"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Videocard0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1024x768" "1024x768" "800x856" "800x856" "800x600" "72
0x400" "640x480"
EndSubSection
EndSection

Section "Screen"
Identifier "Screen1"
Device "Videocard0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1024x768" "1024x768" "800x856" "800x856" "800x600" "72
0x400" "640x480"
EndSubSection
EndSection

can anyone tell me if I created my Xorg.conf file correctly or if I'm way off base. Obviously, I cant get my 2nd monitor to display higher than 800 x 600. Could this be because my 2nd monitor is reporting back as Unknown....any help would be greatly appreciated.


THANKS!!!!

in need of much help...the 800 x 600 resolution is starting to get on my nerves...so if anyone can help it would be greatly appreciated.