Primarily these are for decorative/entertainment purposes, or for password protection. While modern screens are not susceptible to the issues discussed above, screensavers are still used. Gnome-screensaver has an option for password protection LCD computer monitors, including the display panels used in laptop computers, are not susceptible to burn-in because the image is not directly produced by phosphors (although they can suffer from a less extreme and usually non-permanent form of image persistence). Later CRTs were much less susceptible to burn-in than older models due to improvements in phosphor coatings, and because modern computer images are generally lower contrast than the stark green- or white-on-black text and graphics of earlier machines. In these applications, burn-in can be prevented by shifting the position of the display contents every few seconds, or by having a number of different images that are changed regularly. Blanking the screen is out of the question as the machine would appear to be out of service. Older machines designed without burn-in problems taken into consideration often display evidence of screen damage, with images or text such as "Please insert your card" (in the case of ATMs) visible even when the display changes while the machine is in use. Screen-saver programs were designed to help avoid these effects by automatically changing the images on the screen during periods of user inactivity.įor CRTs used in public, such as ATMs and railway ticketing machines, the risk of burn-in is especially high because a stand-by display is shown whenever the machine is not in use. Cathode ray televisions, oscilloscopes and other devices that use CRTs are all susceptible to phosphor burn-in, as are plasma displays to some extent. When the same image is displayed on a CRT screen for long periods, the properties of the exposed areas of the phosphor coating on the inside of the screen gradually and permanently change, eventually leading to a darkened shadow or "ghost" image on the screen, called a screen burn-in. Please let me know if you find any bugs or make any improvements.Purpose Screen protection īefore the advent of LCD screens, most computer screens were based on cathode ray tubes (CRTs). Xdefaults file,Īnd then tell the running xscreensaver process to restart itself, like so: It wakes up, then you will need to reload your. Xscreensaver to notice your changes immediately instead of the next time If you change a setting in your X resource database, or if you want (The file willīe reloaded the next time the screen saver needs to take some action, such asīlanking or unblanking the screen, or picking a new graphics mode.) Is already running, it will notice this, and reload the file. xscreensaver file, you would write the following: Xdefaults file for example, to set the timeout parameter xscreensaver file exists, it overrides any settings xscreensaver file in your home directory or in the X resourceĭatabase. Options to xscreensaver are stored in one of two places: inĪ. Like customize xscreensaver for site-wide use or something. In this manual unless you are trying to do something tricky, You shouldn't need to know any of the stuff described The easy way to configure xscreensaver is to run the Manual page describes lower level ways of changing settings. Program, and change the settings through the GUI. ![]() The easiest way to configure xscreensaver is to simply run the The xscreensaver program is a daemon that runs in the background Note that xscreensaver has a client-server model: Program pops up a dialog box that lets you configure the screen saver,Īnd experiment with the various display modes. It also provides configuration and control of your monitor's power-saving Though its default mode of operation is merely to display pretty pictures on This program can lock your terminal in order to prevent others from using it, Turns off as soon as there is any mouse or keyboard activity. Idle for a period, and then runs a graphics demo chosen at random. The xscreensaver program waits until the keyboard and mouse have been Xscreensaver - extensible screen saver and screen locking framework
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