-------------------------------
first

nano /vm/a4/config/hvm.cfg;cat /vm/a4/config/hvm.cfg | grep
'^[^#].*'>/vm/a4/config/hvm.run;xm new -f /vm/a4/config/hvm.run
Unexpected error: <type 'exceptions.ImportError'>

Please report to xen-devel@lists.xensource.com
Traceback (most recent call last):
  File "/usr/sbin/xm", line 7, in <module>
    main.main(sys.argv)
  File "/usr/lib64/python2.7/site-packages/xen/xm/main.py", line 3983,
in main
    _, rc = _run_cmd(cmd, cmd_name, args)
  File "/usr/lib64/python2.7/site-packages/xen/xm/main.py", line 4007,
in _run_cmd
    return True, cmd(args)
  File "<string>", line 1, in <lambda>
  File "/usr/lib64/python2.7/site-packages/xen/xm/main.py", line 1518,
in xm_importcommand
    cmd = __import__(command, globals(), locals(), 'xen.xm')
  File "/usr/lib64/python2.7/site-packages/xen/xm/new.py", line 26, in
<module>
    from xen.xm.xenapi_create import *
  File "/usr/lib64/python2.7/site-packages/xen/xm/xenapi_create.py",
line 25, in <module>
    from lxml import etree
ImportError: No module named lxml

you have add dependent dev-python/lxml to app-emulation/xen-tools ebuild

-------------------------------------------------
second

xm create /vm/a4/config/hvm.run
Using config file "/vm/a4/config/hvm.run".
Error: Unable to connect to xend: No such file or directory. Is xend
running?

xm list
Error: Unable to connect to xend: No such file or directory. Is xend
running?
/etc/init.d/xencommons start
Starting xenstored...
Setting domain 0 name...
Starting xenconsoled...

/etc/init.d/xend restart
 * Shutting down Xen domains from /etc/xen/auto
 * Closing screen session xen
...                                                                                                   
[ ok ]
Error: Unable to connect to xend: No such file or directory. Is xend
running?
 * Stopping Xen control daemon
...                                                                                                  
[ ok ]
 * Starting Xen control daemon ...

/etc/init.d/xend restart
 *   Stopping all domains
...                                                                                                       
[ ok ]
 * Stopping Xen control daemon
...                                                                                                  
[ ok ]
 * Starting Xen control daemon ...

xm list
Name                                        ID   Mem VCPUs      State  
Time(s)
Domain-0                                     0   520     4    
r-----     24.5
ktssql                                          1536     2              
109.7
mysql                                           2048    
2                 2.6
squid-vm                                        1536    
1                 0.0

xm new -f /vm/a4/config/hvm.run
Using config file "/vm/a4/config/hvm.run".

xm list
Name                                        ID   Mem VCPUs      State  
Time(s)
Domain-0                                     0   520     4     r-----   
158.7
a4                                              1024    
2                 0.0
ktssql                                          1536     2              
109.7
mysql                                           2048    
2                 2.6
squid-vm                                        1536    
1                 0.0

xm start a4
 and server go to hard reboot !


Link to Gentoo BUGZilla http://bugs.gentoo.org/show_bug.cgi?id=361345
Link to Gentoo Forum http://www.gentoo.ru/node/2246
-- 
psychos