Comment 12 for bug 176515

I found some spare time to look at it.
Applications started within the session, always stuck in select, endlessly waiting for a response in my case.

I had prepended a gnome-terminal before xmodmap in Xgl-session. Here is its backtrace

Core was generated by `/usr/bin/gnome-terminal'.
#0 0xb7fc3410 in __kernel_vsyscall ()
(gdb) bt
#0 0xb7fc3410 in __kernel_vsyscall ()
#1 0xb75fb2dd in select () from /lib/tls/i686/cmov/libc.so.6
#2 0xb70c155a in _xcb_in_read_block (c=0x80a7ca0, buf=0x80a7328, len=8) at xcb_in.c:248
#3 0xb70c07fc in xcb_connect_to_fd (fd=3, auth_info=0xbfb79c10) at xcb_conn.c:131
#4 0xb70c2f21 in xcb_connect (displayname=0x0, screenp=0x0) at xcb_util.c:279
#5 0xb76d57f7 in _XConnectXCB () from /usr/lib/libX11.so.6
#6 0xb76be109 in XOpenDisplay () from /usr/lib/libX11.so.6
#7 0xb7a1f032 in gdk_display_open () from /usr/lib/libgdk-x11-2.0.so.0
#8 0xb79fca0d in gdk_display_open_default_libgtk_only () from /usr/lib/libgdk-x11-2.0.so.0
#9 0xb7bb2e4f in gtk_init_check () from /usr/lib/libgtk-x11-2.0.so.0
#10 0xb7bb2e84 in gtk_init () from /usr/lib/libgtk-x11-2.0.so.0

I also checked if xauth really add the token for Xgl and it works correctly.