ss2.patch

commit 3f75b3c3439241c209349908fa190c0382e44f05
Author: wm4 <wm4@nowhere>
Date:   Tue Aug 8 12:55:41 2017 +0200

    x11: drop xscrnsaver use
    
    It's an ancient X11 protocol extension that apparently nobody uses
    anymore (desktop environments in particular have replaced it with
    equally bad protocols that require tons of dependencies). Users keep
    complaining about it being a required dependency.
    
    The impact is likely minimal to none.
    
    Fixes #4706 and other annoying people.
    Diff reverts this.

diff --git b/README.md a/README.md
index 5fa0c4c..ce38279 100644
--- b/README.md
+++ a/README.md
@@ -96,7 +96,7 @@ Example:
 Essential dependencies (incomplete list):
 
 - gcc or clang
-- X development headers (xlib, xrandr, xext, xinerama, libvdpau,
+- X development headers (xlib, xrandr, xext, xscrnsaver, xinerama, libvdpau,
   libGL, GLX, EGL, xv, ...)
 - Audio output development headers (libasound/ALSA, pulseaudio)
 - FFmpeg libraries (libavutil libavcodec libavformat libswscale libavfilter
diff --git b/video/out/x11_common.c a/video/out/x11_common.c
index 41c9d8b..30ad897 100644
--- b/video/out/x11_common.c
+++ a/video/out/x11_common.c
@@ -33,6 +33,7 @@
 #include <X11/XKBlib.h>
 #include <X11/XF86keysym.h>
 
+#include <X11/extensions/scrnsaver.h>
 #include <X11/extensions/dpms.h>
 #include <X11/extensions/Xinerama.h>
 #include <X11/extensions/Xrandr.h>
@@ -1907,9 +1908,22 @@ static void xscreensaver_heartbeat(struct vo_x11_state *x11)
     {
         x11->screensaver_time_last = time;
         sem_post(&x11->screensaver_sem);
+        XResetScreenSaver(x11->display);
     }
 }
 
+static int xss_suspend(Display *mDisplay, Bool suspend)
+{
+    int event, error, major, minor;
+    if (XScreenSaverQueryExtension(mDisplay, &event, &error) != True ||
+        XScreenSaverQueryVersion(mDisplay, &major, &minor) != True)
+        return 0;
+    if (major < 1 || (major == 1 && minor < 1))
+        return 0;
+    XScreenSaverSuspend(mDisplay, suspend);
+    return 1;
+}
+
 static void set_screensaver(struct vo_x11_state *x11, bool enabled)
 {
     Display *mDisplay = x11->display;
@@ -1917,6 +1931,8 @@ static void set_screensaver(struct vo_x11_state *x11, bool enabled)
         return;
     MP_VERBOSE(x11, "%s screensaver.\n", enabled ? "Enabling" : "Disabling");
     x11->screensaver_enabled = enabled;
+    if (xss_suspend(mDisplay, !enabled))
+        return;
     int nothing;
     if (DPMSQueryExtension(mDisplay, &nothing, &nothing)) {
         BOOL onoff = 0;
diff --git b/wscript a/wscript
index feb2085..ad57df9 100644
--- b/wscript
+++ a/wscript
@@ -578,6 +578,7 @@ video_output_features = [
         'name': '--x11',
         'desc': 'X11',
         'func': check_pkg_config('x11',         '>= 1.0.0',
+                                 'xscrnsaver',  '>= 1.0.0',
                                  'xext',        '>= 1.0.0',
                                  'xinerama',    '>= 1.0.0',
                                  'xrandr',      '>= 1.2.0'),

 * Applying patches from /etc/portage/patches/media-video/mpv ...
 *   00-xscrnsaver.patch ...
patch unexpectedly ends in middle of line                                                                          [ ok ]
 * User patches applied.

However, it compiles...