fedora 17 screen resolution changing ?

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http://forums.fedoraforum.org – The monitor I have is a iiyama ProLite 82274HDS. The resolution of the display has according to fedora 17 a maximum of 1280x1024. It can't be changed in a higher value. With Windows 7 it operates in resoluton style 1920x1080 without any problems. First the xorg.conf file in /etc/X11 has the structure Section "Device" Identifier "Videocard0" Driver "vesa" EndSection Adding an extra section to the xorg.conf file Section "Monitor" Modes "1920X1080" "1280x1024" "1024x768" "800x600" (HowTos)