Hello,everyone

When i use the pxe method to install the system for ARM64 machine , i
found some error when anaconda install the packages,the fault is like
below , how to fix it ?? why ?
Thanks very much


find_file: stat /proc/device-tree/chosen/bootpath, No such file or directory
anaconda 21.48.21-1 for Fedora 21 (pre-release) started.
 * installation log files are stored in /tmp during the installation
art
Traceback (most recent call last):
  File "/sbin/anaconda", line 1295, in <module>
    setupDisplay(anaconda, opts, addon_paths)
  File "/sbin/anaconda", line 749, in setupDisplay
    if not nm_is_connecting() and not nm_is_connected():
  File "/usr/lib64/python2.7/site-packages/pyanaconda/nm.py", line
156, in nm_is_connecting
    return nm_state() == NetworkManager.State.CONNECTING
  File "/usr/lib64/python2.7/site-packages/pyanaconda/nm.py", line
128, in nm_state
    prop = _get_property("/org/freedesktop/NetworkManager", "State")
  File "/usr/lib64/python2.7/site-packages/pyanaconda/nm.py", line
106, in _get_property
    proxy = _get_proxy(object_path=object_path,
interface_name="org.freedesktop.DBus.Properties")
  File "/usr/lib64/python2.7/site-packages/pyanaconda/nm.py", line 94,
in _get_proxy
    cancellable)
GLib.Error: g-io-error-quark: Error calling StartServiceByName for
org.freedesktop.NetworkManager: Timeout was reached (24)

Pane is dead
  File "/usr/lib64/python2.7/site-packages/pyanaconda/nm.py", line
106, in _get_property
    proxy = _get_proxy(object_path=object_path,
interface_name="org.freedesktop.DBus.Properties")
  File "/usr/lib64/python2.7/site-packages/pyanaconda/nm.py", line 94,
in _get_proxy
    cancellable)
GLib.Error: g-io-error-quark: Error calling StartServiceByName for
org.freedesktop.NetworkManager: Timeout was reached (24)
Pane is dead
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