[Bug 754198] glimagesink: Xlib / xcb assertion with client-draw signal

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=754198

--- Comment #4 from Vasilis Liaskovitis <vliaskov at gmail.com> ---
I am using radeon driver. Glfw3 is from the application only. Perhaps I can
reproduce the problem without glfw (maybe use GTK in application)

Pipeline with multiple glimagesink elements:
gst-launch-1.0 videotestsrc ! glimagesink videotestsrc ! glimagesink
crashes only when GST_GL_XINITTHREADS is undefined.

Setting pipeline to PAUSED ...
Pipeline is PREROLLING ...
Got context from element 'sink': gst.gl.GLDisplay=context,
gst.gl.GLDisplay=(GstGLDisplay)"\(GstGLDisplayX11\)\ gldisplayx11-0";
[xcb] Unknown request in queue while dequeuing
[xcb] Most likely this is a multi-threaded client and XInitThreads has not been
called
[xcb] Aborting, sorry about that.
gst-launch-1.0: ../../src/xcb_io.c:179: dequeue_pending_request: Assertion
`!xcb_xlib_unknown_req_in_deq' failed.

With GST_GL_XINITTHREADS=1 it works on radeon.

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