From 8b3f1117be1e90866747fa9c9e7ae1c5812ba918 Mon Sep 17 00:00:00 2001 From: Daniel van Vugt Date: Thu, 14 May 2020 18:13:56 +0800 Subject: [PATCH] backend-x11: Reintroduce XInitThreads It was removed in 3.34 as part of 6ed5d2e2. And we thought that was the only thread that might exist and use X11. But the top gnome-shell crasher in 3.36 seems to suggest otherwise. We don't know what or where the offending thread is, but since: 1. We used XInitThreads for years already prior to 3.34; and 2. Extensions or any change to mutter/gnome-shell could conceivably use threads to make X calls, directly or indirectly, it's probably a good idea to reintroduce XInitThreads. The failing assertion in libx11 is also accompanied by a strong hint: ``` fprintf(stderr, "[xcb] Most likely this is a multi-threaded client " \ "and XInitThreads has not been called\n"); ``` https://bugs.launchpad.net/bugs/1877075 Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/1252 https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1256 (cherry picked from commit 1d5f9b6917517d6e777a652cfa5e648794dc632a) --- src/backends/x11/meta-backend-x11.c | 1 + 1 file changed, 1 insertion(+) diff --git a/src/backends/x11/meta-backend-x11.c b/src/backends/x11/meta-backend-x11.c index 225d14d33..539ca5348 100644 --- a/src/backends/x11/meta-backend-x11.c +++ b/src/backends/x11/meta-backend-x11.c @@ -859,6 +859,7 @@ meta_backend_x11_class_init (MetaBackendX11Class *klass) static void meta_backend_x11_init (MetaBackendX11 *x11) { + XInitThreads (); } Display * -- 2.20.1