Re: Strange lockup with metacity

[Richard Stallman]

    I'm seeing a strange problem with 22.0.91.1 on an x86-64 Fedora rawhide
    system (22.0.90 had it too).  Almost everything works great, but any
    attempt to resize an emacs frame using the window manager locks things
    up.  Essentially, metacity grabs the mouse then stops, waiting for
    something; the only way to get my desktop back is to restart metacity
    from somewhere else.

Can you compile metacity with debugging symbols?
You could run it under GDB, perhaps on another machine's console
so you can still type at GDB even when it is hung.