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Before saying anything, I should recommend you backup xorg.conf file using the command sudo cp /etc/X11/xorg.conf /etc/X11/xorg.conf_backupNext, to make any changes it is recommended to stop Xorg (which will bring you to a text-only screen) using the command sudo /etc/init.d/lightdm stop(Hopefully you are running Ubuntu 12.04 or 11.10. If not, just substitute lightdm for gdm or kdm if running kde). After that, you can edit your configuration file via sudo nano /etc/X11/xorg.confFrom there, look for the Subsection Display, then navigate down to modes where you will type in your custom resolution with the refresh rate. Then save it, and restart X. If none of that worked, and I completely screwed your xorg over, you can restore the backup (thank god for backups) using the command sudo /etc/X11/xorg.conf_backup /etc/X11/xorg.conf (责任编辑：) |