[Xcb] [Bug 9528] client hangs when using xcb-enabled libX11 locally

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Oct 9 12:32:23 PDT 2009


Jamey Sharp <jamey at minilop.net> changed:

           What    |Removed                     |Added
          QAContact|                            |xcb at lists.freedesktop.org

--- Comment #9 from Jamey Sharp <jamey at minilop.net>  2009-10-09 12:32:22 PST ---
(In reply to comment #8)
> (In reply to comment #6)
> > Jamey and I just announced a set of changes to XCB and Xlib/XCB which, among
> > other things, should address all the outstanding synchronization problems that
> > we know of.
> We still hit this even with the latest xcb and xlib releases (which include the
> patches as far as I can tell). The only fix I've found is disabling xcb support
> in xlib. If there are any other patches available, I can test them out, no
> problem. Let me know if you need any more information.
> We primarily hit this with Shake (commericial 2D compositing package) and
> Houdini as mentioned above. 

Although you believe you had the socket-handoff version when you last tested, I
can't help hoping the socket-handoff work fixed the problem for you, because I
don't know of any hangs we haven't fixed already. So could you confirm that you
can still reproduce the bug?

I tried to download Houdini to test it myself, but the 200MB download, and that
all closed-source, is just too much.

So if you can still reproduce the problem, would you start with "thread apply
all bt full" in gdb, to show us what was going on when it hung? Preferably,
have debug symbols for libX11 and libxcb installed first.

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