[Xcb] [Bug 84252] DRI3 rendering gets stuck waiting for present idle notify event

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84252

--- Comment #54 from Uli Schlachter <psychon at znc.in> ---
Created attachment 116463
  --> https://bugs.freedesktop.org/attachment.cgi?id=116463&action=edit
Make _xcb_in_wake_up_next_reader() wake up threads in
xcb_wait_for_special_event()

Can someone check if this patch for libxcb also fixes the bug?

This replaces half of Michel's patch, so you would still need this part from
that other patch (this part is already committed to libxcb's git master, so you
could also just test master + this patch):

diff --git a/src/xcb_in.c b/src/xcb_in.c
index 623a0a8..2ce5a56 100644
--- a/src/xcb_in.c
+++ b/src/xcb_in.c
@@ -761,6 +761,7 @@ xcb_generic_event_t
*xcb_wait_for_special_event(xcb_connection_t *c,
         if(!_xcb_conn_wait(c, &se->special_event_cond, 0, 0))
             break;

+    _xcb_in_wake_up_next_reader(c);
     pthread_mutex_unlock(&c->iolock);
     return event;
 }


Thanks for testing

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