Sreeram BS wrote: > > > However, I have a set of basic questions and am curious to know > about them: > > a) What is the significance of 'refresh rate'? In my machine it is set > to 60 Hz. This depends on the X driver and the capabilities advertised by the monitor so there isn't a simple answer that covers all configurations.
You monitor advertises a refresh rate operating range of 59-75Hz, but the preferred timing is 1280x720 at 60Hz. For LCD panels, the preferred refresh rate is usually chosen for the best display quality. (Higher refresh rates for CRTs is a totally different issue). > b) Where does the OS get the list of 'resolution modes' which it shows > up. Is there any file which has the list of these modes? If yes, which > is that file? This is dynamically generated by the X driver. Look for the list of Modelines near the bottom of /var/log/Xorg.0.log. You can manually add candidate modelines to /etc/X11/xorg.conf, but they need to pass validation by the X driver before being added to the advertised list. > c) Are these modes standard ones? In other words, what should I do if > I want to set the resolution to a value which is not listed in the > list, but still achievable. Example: A resolution of 1018 x 706 is > achievable given the string 'Virtual 1280 x 768', but may not appear > in the list of choosable modes. What should be done at that time? You should add a modeline to /etc/X11/xorg.conf for the video mode you wish the driver to validate.
