Sync after ungrabbing the server.

Turns out that XUngrabServer is not a synchronous call, so there is a
race condition with the new startup order where the ungrab server request
will sit in the output buffer waiting to be processed and the server won't
actually be ungrabbed when we start loading plugins. This can have all
kinds of side effects, for example when initializing GConf with GDBus,
there will be a call to dbus-launch --autostart to try and get the
session bus ID which will fail if there is still a server grab
that hasn't been released (since it attempts to read X11 properties)

Fixes LP: #691561

1 files changed, 1 insertions, 0 deletions

diff --git a/src/screen.cpp b/src/screen.cpp
index eae037a..8c93249 100644
--- a/src/screen.cpp
+++ b/src/screen.cpp
@@ -4570,6 +4570,7 @@ CompScreen::init (const char *name)
     XDefineCursor (dpy, priv->root, priv->normalCursor);
 
     XUngrabServer (dpy);
+    XSync (dpy, FALSE);
 
     priv->setAudibleBell (priv->optionGetAudibleBell ());