On Sun, 19 Apr 2009, Julien Danjou wrote: > At 1240136117 time_t, Vincent Torri wrote: >> what should I pass for the 2nd parameter ? > > I think it's the sequence contained inside the request cookie. indeed, thank you. And it seems that i have to call xcb_flush before the xcb_poll_for_reply calls too. Thanks to Chritoph for that remark :) Vincent