[Vens]

В /etc... следующее
Section "Screen"
Identifier "Screen0"
Device "Card0|0"
Monitor "L192WS|0"
DefaultDepth 24
SubSection "Display"
Depth 8
Modes "1440x900" "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480"
EndSubSection
SubSection "Display"
Depth 15
Modes "1440x900" "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480"
EndSubSection
SubSection "Display"
Depth 16
Modes "1440x900" "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480"
EndSubSection
SubSection "Display"
Depth 24
Modes "1440x900" "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480"
EndSubSection
SubSection "Display"
Depth 32
Modes "1440x900" "1280x1024" "1024x768" "832x624" "800x600" "720x400" "640x480"
EndSubSection
EndSection

В /var... нужный режим отсутствует. Я начинающий, но все просмотрел.