From Wikipedia:

• Xscreensaverstopper
• Xscreensaver As Background
• Xscreensaver Clock

XScreenSaver is the standard screen saver collection shipped on most Linux and Unix systems. I released the first version in 1992. In 2006, I ported it to MacOS, and in 2012 I ported it to iOS. This application is not a screen saver, of course, since iOS doesn't have those. The xscreensaver daemon takes care of detecting when the user is idle, locking, and checking passwords and all the other book-keeping. All the other programs need to do is draw. The benefit that xscreensaver has over the combination of the xlock and xautolock programs is the ease with which new graphic hacks can be installed. Easy Raspberry Pi Based Screensaver/Slideshow for Exhibitions/Store Front: At exhibitions you often want to show off your work in the hopes of attracting new potential customers. This also works for the windows of stores to advertise products on sale within. Most will simply create a large fixed image poster at great ex. We would like to show you a description here but the site won’t allow us. XScreenSaver a collection of free screen savers for X11 and MacOS By Jamie Zawinski and many others This is the XScreenSaver source code distribution.

The xinit program allows a user to manually start an Xorg display server. The startx(1) script is a front-end for xinit(1).

xinit is typically used to start window managers or desktop environments. While you can also use xinit to run GUI applications without a window manager, many graphical applications expect an EWMH compliant window manager. Display managers start Xorg for you and generally source xprofile.

Installation

Install the xorg-xinit package.

Configuration

xinit and startx take an optional client program argument, see #Override xinitrc. If you do not provide one they will look for ~/.xinitrc to run as a shell script to start up client programs.

xinitrc

~/.xinitrc is handy to run programs depending on X and set environment variables on X server startup. If it is present in a user's home directory, startx and xinit execute it. Otherwise startx will run the default /etc/X11/xinit/xinitrc.

This default xinitrc will start a basic environment with Twm, xorg-xclock and Xterm (assuming that the necessary packages are installed). Therefore, to start a different window manager or desktop environment, first create a copy of the default xinitrc in your home directory:

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Long-running programs started before the window manager, such as a screensaver and wallpaper application, must either fork themselves or be run in the background by appending an & sign. Otherwise, the script would halt and wait for each program to exit before executing the window manager or desktop environment. Note that some programs should instead not be forked, to avoid race bugs, as is the case of xrdb. Prepending exec will replace the script process with the window manager process, so that X does not exit even if this process forks to the background.

xserverrc

The xserverrc file is a shell script responsible for starting up the X server. Both startx and xinit execute ~/.xserverrc if it exists, startx will use /etc/X11/xinit/xserverrc otherwise.

In order to maintain an authenticated session with logind and to prevent bypassing the screen locker by switching terminals, Xorg has to be started on the same virtual terminal where the login occurred [1]. Therefore it is recommended to specify vt$XDG_VTNR in the ~/.xserverrc file:

See Xserver(1) for a list of all command line options.

Alternatively, if you wish to have the X display on a separate console from the one where the server is invoked, you can do so by using the X server wrapper provided by /usr/lib/systemd/systemd-multi-seat-x. For convenience, xinit and startx can be set up to use this wrapper by modifying your ~/.xserverrc.

Usage

To run Xorg as a regular user, issue:

Or if #xserverrc is configured:

Your window manager (or desktop environment) of choice should now start correctly.

To quit X, run your window manager's exit function (assuming it has one). If it lacks such functionality, run:

See also signal(7).

Tips and tricks

Override xinitrc

If you have a working ~/.xinitrc but just want to try other window manager or desktop environment, you can run it by issuing startx followed by the path to the window manager, for example:

If the binary takes arguments, they need to be quoted to be recognized as part of the first parameter of startx:

Note that the full path is required. You can also specify custom options for the #xserverrc script by appending them after the double dash -- sign:

See also startx(1).

This article or section needs language, wiki syntax or style improvements. See Help:Style for reference.

Autostart X at login

Make sure that startx is properly configured.

Place the following in your shell initialization file (see Command-line shell#Login shell):

You can replace the -eq comparison with one like -le 3 (for vt1 to vt3) if you want to use graphical logins on more than one virtual terminal.

Alternative conditions to detect the virtual terminal include '$(tty)' = '/dev/tty1', which does not allow comparison with -le, and '$(fgconsole 2>/dev/null || echo -1)' -eq 1, which does not work in serial consoles.

If you would like to remain logged in when the X session ends, remove exec.

See also Fish#Start X at login and Systemd/User#Automatic login into Xorg without display manager.

Switching between desktop environments/window managers

If you are frequently switching between different desktop environments or window managers, it is convenient to either use a display manager or expand ~/.xinitrc to make the switching possible.

The following example shows how to start a particular desktop environment or window manager with an argument:

To pass the argument session:

or

Starting applications without a window manager

It is possible to start only specific applications without a window manager, although most likely this is only useful with a single application shown in full-screen mode. For example:

Alternatively the binary can be called directly from the command prompt as described in #Override xinitrc.

With this method you need to set each application's window geometry through its own configuration files (if possible at all).

See also Display manager#Starting applications without a window manager.

Output redirection using startx

See Xorg#Session log redirection for details.

Introduction

The BOINC client software on Windows and Mac OS X includes a screensaver program, which you can select as your screensaver.

On Windows:

• Right-click on the desktop.
• Click Personalize, select Screen Saver, and select BOINC.

On Mac OS X:

• Under the Apple menu, select System Preferences.
• Click on Desktop & Screen Saver.
• Select BOINCSaver from the list of screen savers.

On Linux:

This is a XScreenSaver compatible BOINC screensaver for Unix/X11.

To use this screensaver, please add the following to the 'programs' preference in your .xscreensaver file:

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• GL: boincscr -root n

If your BOINC directory differs from /var/lib/boinc, you can use the -boinc_dir command line argument.

When run, this screensaver connects to the BOINC client via RPC, asks for graphics providing tasks and starts a random graphics application. The window created by the graphics application is then searched for using X11 window properties, such as 'WM_COMMAND'. Not every graphics application seems to support this, but this method has been successfully tested with Einstein@Home and Climateprediction.net. When the graphics application window has been found, it will be embedded into the XScreenSaver-provided fullscreen-window, the root window, the preview window or a newly created window, depending on the environment, using the XEMBED method.

NOTE: BOINC runs even if you don't use the screensaver.

Screensaver Modes

Xscreensaverstopper

The BOINC screensaver has 3 modes:

• The overview screensaver displays general information, such as the BOINC status, a list of projects, etc.
• The project graphics display the graphics for one of the currently running tasks, e.g., SETI@home. However, many projects do not have screensaver graphics.
• The screensaver coordinator controls the screensaver, selecting either the default screensaver or project graphics. It appears when neither the overview screensaver nor project graphics are available, and displays a moving BOINC logo with messages such as 'Connecting to BOINC application' or 'BOINC screensaver loading.'

Screensaver Settings

Xscreensaver As Background

By default, the screensaver switches among the overview screensaver and project graphics periodically. The overview screensaver also runs when no project is contemporaneously running (e.g., if BOINC is suspended), or when none of the currently running projects supports screensaver graphics.

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You can control how the BOINC screensaver switches among its modes.

• On windows, click Settings in the Screen Saver Properties window.
• On Mac OS X, click Options in the Screen Saver control panel.

The settings are:

• Blank screensaver after: To reduce the processing power used by the screensaver, you can set it to blank the screen after the specified number of minutes. Reducing the processing power used by the screensaver makes more processing power available to BOINC projects. If you choose never, the screensaver will continue displaying graphics indefinitely.

• Run BOINC/overview screensaver for: selects the number of minutes to run the BOINC [overview] screensaver [BOINC screensaver duration] in each cycle. If you choose never, the BOINC screensaver will run only when no project graphics are available.

• Run project screensavers for: selects the number of minutes to run the project graphics [project graphics duration] in each cycle (assuming project graphics are currently available). If you choose never, project graphics will never be shown. Note: if you set the overview screensaver duration to never, this setting is ignored and project graphics will be shown whenever available (i.e., project graphics duration is effectively infinite).

• Switch between project screensavers every: selects how often to switch among project graphics within the project graphics duration. This has an effect only if it is shorter than the project graphics duration and only if your computer can run multiple BOINC tasks simultaneously (e.g., if the computer has multiple processors). If you choose never, the project graphics for just one task will be shown for the entire project graphics duration of each cycle, switching only if that task stops running.

Disabling screen saver

On Windows:

• Right-click on the desktop.
• Click Properties, select Screen Saver

Here you can disable the screen saver by reversing your choice of using BOINC as the screen saver.
Either set it to None for no screen saver at all, or use another (Windows) screen saver instead.

On Mac OS X:

• Under the Apple menu, select System Preferences.
• Click on Desktop & Screen Saver.
• In 10.4/10.5/10.6/10.7, drag the Start screen saver: slider to Never.
• In 10.8, from the Start after: drop-down list, select Never.

Xscreensaver Clock