Description of problem:
Hello. I get the following crash each time I try installing F22 RC4 on IBM Power7/8 systems.

Starting installer, one moment...
anaconda 22.20.2-1 for Fedora-Server 22 (pre-release) started.
 * installation log files are stored in /tmp during the installation
 * shell is available on TTY2
 * if the graphical installation interface fails to start, try again with the
   inst.text bootoption to start text installation
 * when reporting a bug add logs from /tmp as separate text/plain attachments
Traceback (most recent call last):
  File "/sbin/anaconda", line 1262, in <module>
    setupDisplay(anaconda, opts, addon_paths)
  File "/sbin/anaconda", line 704, in setupDisplay
    anaconda.initInterface(addons)
  File "/usr/lib64/python2.7/site-packages/gi/importer.py", line 159, in load_module
    dynamic_module = load_overrides(introspection_module)
  File "/usr/lib64/python2.7/site-packages/gi/overrides/__init__.py", line 72, in load_overrides
    override_mod = importlib.import_module('gi.overrides.' + namespace)
  File "/usr/lib64/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/usr/lib64/python2.7/site-packages/gi/overrides/AnacondaWidgets.py", line 33, in <module>
    class MountpointSelector(Anaconda.MountpointSelector):
  File "/usr/lib64/python2.7/site-packages/gi/module.py", line 176, in __getattr__
    g_type = info.get_g_type()
  File "/usr/lib64/python2.7/site-packages/pyanaconda/iutil.py", line 486, in _sigchld_handler
    _raise_exit_error(exit_statuses)
  File "/usr/lib64/python2.7/site-packages/pyanaconda/iutil.py", line 450, in _raise_exit_error
    raise ExitError(", ".join(exn_message))
pyanaconda.iutil.ExitError: metacity exited on signal 5

Pane is dead