https://bugs.freedesktop.org/show_bug.cgi?id=71431

--- Comment #6 from ka.nick@mail.ru --- Created attachment 89177 --> https://bugs.freedesktop.org/attachment.cgi?id=89177&action=edit bisect log with some comments added

Alex, here is a bisecting results. Please note that few commits away from the first bad commit it became half-broken - background isn't corrupted but lxdm doesn't start, and x keeps restarting.