Hi All,

I'm trying to boot Ubuntu 12.04 LTS precise i386 as domU after a clean 
installation on Fedora F17 and/or F18 dom0 fully
updated.
Ubuntu precise was installed with

virt-install --debug --connect xen:/// -n Ubuntu12LTS4 --nographics --vcpus=2 
-r 1024 --arch=i686 -l
http://ca.archive.ubuntu.com/ubuntu/dists/precise/main/installer-i386 --network 
bridge=peth0 --os-type=linux
--os-variant=ubuntuprecise --disk 
/dev/disk/by-path/ip-10.0.0.1:3260-iscsi-iqn.2011-01.it.tekno-soft:xen.vm.Ubuntu-lun-4

After a clean instllation I'm unable to boot anymore the new domU. BTW I was 
able to install and boot clean the 64bits
version of the same distribution.

Do you have any suggestion how to solve this?

Thanks in advance.
Roberto Fichera.

------>>>> start installation
[2013-03-04 19:16:53 875] DEBUG (XendDomainInfo:103) 
XendDomainInfo.create(['vm', ['name', 'Ubuntu12LTS4'], ['memory',
'1024'], ['maxmem', '1024'], ['vcpus', '2'], ['uuid', 
'4c46f867-161a-c593-eb1d-0ac7494ae5d6'], ['on_poweroff',
'destroy'], ['on_reboot', 'destroy'], ['on_crash', 'destroy'], ['image', 
['linux', ['kernel',
'/var/lib/xen/virtinst-vmlinuz.DbC4dh'], ['ramdisk', 
'/var/lib/xen/virtinst-initrd.gz.loYsS3'], ['args',
'method=http://ca.archive.ubuntu.com/ubuntu/dists/precise/main/installer-i386'],
 ['localtime', '0']]], ['localtime',
'0'], ['device', ['vbd', ['dev', 'xvda'], ['uname',
'phy:/dev/disk/by-path/ip-10.0.0.1:3260-iscsi-iqn.2011-01.it.tekno-soft:xen.vm.Ubuntu-lun-4'],
 ['mode', 'w']]],
['device', ['vif', ['mac', '00:16:3e:78:72:3d'], ['bridge', 'peth0'], 
['script', 'vif-bridge']]]])
[2013-03-04 19:16:53 875] DEBUG (XendDomainInfo:2499) 
XendDomainInfo.constructDomain
[2013-03-04 19:16:53 875] DEBUG (balloon:172) Balloon: tmem relinquished -1 KiB 
of 11748 KiB requested.
[2013-03-04 19:16:53 875] DEBUG (balloon:193) Balloon: 4636 KiB free; 0 to 
scrub; need 16384; retries: 20.
[2013-03-04 19:16:53 875] DEBUG (balloon:207) Balloon: setting dom0 target to 
7987 MiB.
[2013-03-04 19:16:53 875] DEBUG (XendDomainInfo:1467) Setting memory target of 
domain Domain-0 (0) to 7987 MiB.
[2013-03-04 19:16:53 875] DEBUG (balloon:187) Balloon: 16924 KiB free; need 
16384; done.
[2013-03-04 19:16:53 875] DEBUG (XendDomain:476) Adding Domain: 2
[2013-03-04 19:16:53 875] DEBUG (XendDomainInfo:2842) 
XendDomainInfo.initDomain: 2 256
[2013-03-04 19:16:53 875] DEBUG (XendDomainInfo:2869) 
_initDomain:shadow_memory=0x0, memory_static_max=0x40000000,
memory_static_min=0x0.
[2013-03-04 19:16:53 875] DEBUG (balloon:172) Balloon: tmem relinquished -1 KiB 
of 1031848 KiB requested.
[2013-03-04 19:16:53 875] DEBUG (balloon:193) Balloon: 16728 KiB free; 0 to 
scrub; need 1048576; retries: 20.
[2013-03-04 19:16:53 875] DEBUG (balloon:207) Balloon: setting dom0 target to 
6979 MiB.
[2013-03-04 19:16:53 875] DEBUG (XendDomainInfo:1467) Setting memory target of 
domain Domain-0 (0) to 6979 MiB.
[2013-03-04 19:16:54 875] DEBUG (balloon:193) Balloon: 209240 KiB free; 0 to 
scrub; need 1048576; retries: 20.
[2013-03-04 19:16:54 875] DEBUG (balloon:207) Balloon: setting dom0 target to 
6975 MiB.
[2013-03-04 19:16:54 875] DEBUG (XendDomainInfo:1467) Setting memory target of 
domain Domain-0 (0) to 6975 MiB.
[2013-03-04 19:16:54 875] DEBUG (balloon:193) Balloon: 606552 KiB free; 0 to 
scrub; need 1048576; retries: 20.
[2013-03-04 19:16:54 875] INFO (image:186) buildDomain os=linux dom=2 vcpus=2
[2013-03-04 19:16:54 875] DEBUG (image:725) domid          = 2
[2013-03-04 19:16:54 875] DEBUG (image:726) memsize        = 1024
[2013-03-04 19:16:54 875] DEBUG (image:727) image          = 
/var/lib/xen/virtinst-vmlinuz.DbC4dh
[2013-03-04 19:16:54 875] DEBUG (image:728) store_evtchn   = 1
[2013-03-04 19:16:54 875] DEBUG (image:729) console_evtchn = 2
[2013-03-04 19:16:54 875] DEBUG (image:730) cmdline        =
method=http://ca.archive.ubuntu.com/ubuntu/dists/precise/main/installer-i386
[2013-03-04 19:16:54 875] DEBUG (image:731) ramdisk        = 
/var/lib/xen/virtinst-initrd.gz.loYsS3
[2013-03-04 19:16:54 875] DEBUG (image:732) vcpus          = 2
[2013-03-04 19:16:54 875] DEBUG (image:733) features       =
[2013-03-04 19:16:54 875] DEBUG (image:734) flags          = 0
[2013-03-04 19:16:54 875] DEBUG (image:735) superpages     = 0
[2013-03-04 19:16:55 875] INFO (XendDomainInfo:2358) createDevice: vbd : 
{'uuid':
'fa2a9871-4d1b-deb4-c39d-b00f0900f752', 'bootable': 1, 'driver': 
'paravirtualised', 'dev': 'xvda', 'uname':
'phy:/dev/disk/by-path/ip-10.0.0.1:3260-iscsi-iqn.2011-01.it.tekno-soft:xen.vm.Ubuntu-lun-4',
 'mode': 'w'}
[2013-03-04 19:16:55 875] DEBUG (DevController:95) DevController: writing 
{'virtual-device': '51712', 'device-type':
'disk', 'protocol': 'x86_32-abi', 'backend-id': '0', 'state': '1', 'backend': 
'/local/domain/0/backend/vbd/2/51712'} to
/local/domain/2/device/vbd/51712.
[2013-03-04 19:16:55 875] DEBUG (DevController:97) DevController: writing 
{'domain': 'Ubuntu12LTS4', 'frontend':
'/local/domain/2/device/vbd/51712', 'uuid': 
'fa2a9871-4d1b-deb4-c39d-b00f0900f752', 'bootable': '1', 'dev': 'xvda',
'state': '1', 'params': 
'/dev/disk/by-path/ip-10.0.0.1:3260-iscsi-iqn.2011-01.it.tekno-soft:xen.vm.Ubuntu-lun-4',
'mode': 'w', 'online': '1', 'frontend-id': '2', 'type': 'phy'} to 
/local/domain/0/backend/vbd/2/51712.
[2013-03-04 19:16:55 875] INFO (XendDomainInfo:2358) createDevice: vif : 
{'bridge': 'peth0', 'mac': '00:16:3e:78:72:3d',
'uuid': '00ee7c72-6495-aeeb-b85b-78b8cf2e8f3a', 'script': 'vif-bridge'}
[2013-03-04 19:16:55 875] DEBUG (DevController:95) DevController: writing 
{'mac': '00:16:3e:78:72:3d', 'handle': '0',
'protocol': 'x86_32-abi', 'backend-id': '0', 'state': '1', 'backend': 
'/local/domain/0/backend/vif/2/0'} to
/local/domain/2/device/vif/0.
[2013-03-04 19:16:55 875] DEBUG (DevController:97) DevController: writing 
{'bridge': 'peth0', 'domain': 'Ubuntu12LTS4',
'handle': '0', 'uuid': '00ee7c72-6495-aeeb-b85b-78b8cf2e8f3a', 'script': 
'/etc/xen/scripts/vif-bridge', 'mac':
'00:16:3e:78:72:3d', 'frontend-id': '2', 'state': '1', 'online': '1', 
'frontend': '/local/domain/2/device/vif/0'} to
/local/domain/0/backend/vif/2/0.
[2013-03-04 19:16:55 875] DEBUG (XendDomainInfo:3426) Storing VM details: 
{'on_xend_stop': 'ignore', 'pool_name':
'Pool-0', 'shadow_memory': '0', 'uuid': '4c46f867-161a-c593-eb1d-0ac7494ae5d6', 
'on_reboot': 'destroy', 'start_time':
'1362421015.27', 'on_poweroff': 'destroy', 'bootloader_args': '', 
'on_xend_start': 'ignore', 'on_crash': 'destroy',
'xend/restart_count': '0', 'vcpus': '2', 'vcpu_avail': '3', 'bootloader': '', 
'image': "(linux (kernel
/var/lib/xen/virtinst-vmlinuz.DbC4dh) (ramdisk 
/var/lib/xen/virtinst-initrd.gz.loYsS3) (args
'method=http://ca.archive.ubuntu.com/ubuntu/dists/precise/main/installer-i386') 
(superpages 0) (pci ()) (localtime 0)
(nomigrate 0) (tsc_mode 0) (notes (HV_START_LOW 4118806528) (FEATURES 
'!writable_page_tables|pae_pgdir_above_4gb')
(VIRT_BASE 3221225472) (GUEST_VERSION 2.6) (PADDR_OFFSET 0) (GUEST_OS linux) 
(HYPERCALL_PAGE 3222282240) (LOADER
generic) (SUSPEND_CANCEL 1) (PAE_MODE yes) (ENTRY 3231150080) (XEN_VERSION 
xen-3.0)))", 'name': 'Ubuntu12LTS4'}
[2013-03-04 19:16:55 875] DEBUG (XendDomainInfo:1795) Storing domain details: 
{'console/ring-ref': '3995592',
'image/entry': '3231150080', 'console/port': '2', 'store/ring-ref': '3995593', 
'image/loader': 'generic', 'vm':
'/vm/4c46f867-161a-c593-eb1d-0ac7494ae5d6', 
'control/platform-feature-multiprocessor-suspend': '1',
'image/hv-start-low': '4118806528', 'image/guest-os': 'linux', 
'cpu/1/availability': 'online', 'image/virt-base':
'3221225472', 'memory/target': '1048576', 'image/guest-version': '2.6', 
'control/platform-feature-xs_reset_watches':
'1', 'image/pae-mode': 'yes', 'description': '', 'console/limit': '1048576', 
'image/paddr-offset': '0',
'image/hypercall-page': '3222282240', 'image/suspend-cancel': '1', 
'cpu/0/availability': 'online',
'image/features/pae-pgdir-above-4gb': '1', 
'image/features/writable-page-tables': '0', 'console/type': 'xenconsoled',
'name': 'Ubuntu12LTS4', 'domid': '2', 'image/xen-version': 'xen-3.0', 
'store/port': '1'}
[2013-03-04 19:16:55 875] DEBUG (DevController:95) DevController: writing 
{'protocol': 'x86_32-abi', 'state': '1',
'backend-id': '0', 'backend': '/local/domain/0/backend/console/2/0'} to 
/local/domain/2/device/console/0.
[2013-03-04 19:16:55 875] DEBUG (DevController:97) DevController: writing 
{'domain': 'Ubuntu12LTS4', 'frontend':
'/local/domain/2/device/console/0', 'uuid': 
'5dd32309-9c65-6ffd-29f5-911184f95f09', 'frontend-id': '2', 'state': '1',
'location': '2', 'online': '1', 'protocol': 'vt100'} to 
/local/domain/0/backend/console/2/0.
[2013-03-04 19:16:55 875] DEBUG (XendDomainInfo:1882) 
XendDomainInfo.handleShutdownWatch
[2013-03-04 19:16:55 875] DEBUG (DevController:139) Waiting for devices tap2.
[2013-03-04 19:16:55 875] DEBUG (DevController:139) Waiting for devices vif.
[2013-03-04 19:16:55 875] DEBUG (DevController:144) Waiting for 0.
[2013-03-04 19:16:55 875] DEBUG (DevController:628) hotplugStatusCallback 
/local/domain/0/backend/vif/2/0/hotplug-status.
[2013-03-04 19:16:55 875] DEBUG (DevController:642) hotplugStatusCallback 1.
[2013-03-04 19:16:55 875] DEBUG (DevController:139) Waiting for devices vkbd.
[2013-03-04 19:16:55 875] DEBUG (DevController:139) Waiting for devices ioports.
[2013-03-04 19:16:55 875] DEBUG (DevController:139) Waiting for devices tap.
[2013-03-04 19:16:55 875] DEBUG (DevController:139) Waiting for devices vif2.
[2013-03-04 19:16:55 875] DEBUG (DevController:139) Waiting for devices console.
[2013-03-04 19:16:55 875] DEBUG (DevController:144) Waiting for 0.
[2013-03-04 19:16:55 875] DEBUG (DevController:139) Waiting for devices vscsi.
[2013-03-04 19:16:55 875] DEBUG (DevController:139) Waiting for devices vbd.
[2013-03-04 19:16:55 875] DEBUG (DevController:144) Waiting for 51712.
[2013-03-04 19:16:55 875] DEBUG (DevController:628) hotplugStatusCallback
/local/domain/0/backend/vbd/2/51712/hotplug-status.
[2013-03-04 19:16:55 875] DEBUG (DevController:642) hotplugStatusCallback 1.
[2013-03-04 19:16:55 875] DEBUG (DevController:139) Waiting for devices irq.
[2013-03-04 19:16:55 875] DEBUG (DevController:139) Waiting for devices vfb.
[2013-03-04 19:16:55 875] DEBUG (DevController:139) Waiting for devices pci.
[2013-03-04 19:16:55 875] DEBUG (DevController:139) Waiting for devices vusb.
[2013-03-04 19:16:55 875] DEBUG (DevController:139) Waiting for devices vtpm.
[2013-03-04 19:16:55 875] INFO (XendDomain:1225) Domain Ubuntu12LTS4 (2) 
unpaused.
------<<<<< end installation

------>>>>> boot after installation
[2013-03-04 19:16:55 875] DEBUG (XendDomainInfo:260) 
XendDomainInfo.createDormant({'vcpus_params': {'cap': 0, 'weight':
256}, 'PV_args': '', 'features': '', 'cpus': [[], []], 'use_tmp_kernel': False, 
'devices':
{'83fdcc8b-0531-a070-31c1-fcbfb1c0f5a1': ('vbd', {'uuid': 
'83fdcc8b-0531-a070-31c1-fcbfb1c0f5a1', 'bootable': 1,
'driver': 'paravirtualised', 'dev': 'xvda', 'uname':
'phy:/dev/disk/by-path/ip-10.0.0.1:3260-iscsi-iqn.2011-01.it.tekno-soft:xen.vm.Ubuntu-lun-4',
 'mode': 'w'}),
'd77894b3-f8bb-0c8a-cab8-8abe749b5123': ('vif', {'bridge': 'peth0', 'mac': 
'00:16:3e:78:72:3d', 'uuid':
'd77894b3-f8bb-0c8a-cab8-8abe749b5123', 'script': 'vif-bridge'})}, 
'memory_sharing': 0, 'superpages': 0, 'VCPUs_live':
1, 'PV_bootloader': '/usr/bin/pygrub', 'actions_after_crash': 'restart', 
'vbd_refs':
['83fdcc8b-0531-a070-31c1-fcbfb1c0f5a1'], 'PV_ramdisk': '', 
'is_control_domain': False, 'name_label': 'Ubuntu12LTS4',
'VCPUs_at_startup': 1, 'HVM_boot_params': {}, 'platform': {'tsc_mode': 0, 
'nomigrate': 0, 'localtime': '0'},
'PV_kernel': '', 'console_refs': [], 'on_xend_stop': 'ignore', 'pool_name': 
'Pool-0', 'memory_static_min': 0,
'HVM_boot_policy': '', 'description': '', 'VCPUs_max': 2, 'memory_static_max': 
1073741824, 'actions_after_shutdown':
'destroy', 'use_tmp_ramdisk': False, 'on_xend_start': 'ignore', 
'memory_dynamic_max': 1073741824,
'actions_after_suspend': '', 'is_a_template': False, 'PV_bootloader_args': '', 
'memory_dynamic_min': 1073741824, 'uuid':
'4c46f867-161a-c593-eb1d-0ac7494ae5d6', 'shadow_memory': 0, 'target': 0, 
'vcpu_avail': 3, 'other_config': {},
'auto_power_on': False, 'actions_after_reboot': 'restart', 'Description': '', 
'vif_refs':
['d77894b3-f8bb-0c8a-cab8-8abe749b5123'], 'vtpm_refs': []})
[2013-03-04 19:16:55 875] DEBUG (XendDomain:1036) Creating new managed domain: 
Ubuntu12LTS4
[2013-03-04 19:37:03 875] INFO (XendDomainInfo:2079) Domain has shutdown: 
name=Ubuntu12LTS4 id=2 reason=reboot.
[2013-03-04 19:37:03 875] DEBUG (XendDomainInfo:3077) XendDomainInfo.destroy: 
domid=2
[2013-03-04 19:37:03 875] DEBUG (XendDomainInfo:2402) Destroying device model
[2013-03-04 19:37:03 875] DEBUG (XendDomainInfo:2409) Releasing devices
[2013-03-04 19:37:03 875] DEBUG (XendDomainInfo:2415) Removing vif/0
[2013-03-04 19:37:03 875] DEBUG (XendDomainInfo:1276) 
XendDomainInfo.destroyDevice: deviceClass = vif, device = vif/0
[2013-03-04 19:37:03 875] DEBUG (XendDomainInfo:2415) Removing console/0
[2013-03-04 19:37:03 875] DEBUG (XendDomainInfo:1276) 
XendDomainInfo.destroyDevice: deviceClass = console, device =
console/0
[2013-03-04 19:37:03 875] DEBUG (XendDomainInfo:2415) Removing vbd/51712
[2013-03-04 19:37:03 875] DEBUG (XendDomainInfo:1276) 
XendDomainInfo.destroyDevice: deviceClass = vbd, device = vbd/51712
[2013-03-04 19:37:11 875] DEBUG (SrvDomain:76) Starting domain Ubuntu12LTS4 
False
[2013-03-04 19:37:11 875] DEBUG (XendDomainInfo:2499) 
XendDomainInfo.constructDomain
[2013-03-04 19:37:11 875] DEBUG (balloon:187) Balloon: 1053208 KiB free; need 
16384; done.
[2013-03-04 19:37:11 875] DEBUG (XendDomain:476) Adding Domain: 3
[2013-03-04 19:37:11 875] DEBUG (XendDomainInfo:2842) 
XendDomainInfo.initDomain: 3 256
[2013-03-04 19:37:11 7673] DEBUG (XendBootloader:113) Launching bootloader as 
['/usr/bin/pygrub',
'--output=/var/run/xend/boot/xenbl.639',
'/dev/disk/by-path/ip-10.0.0.1:3260-iscsi-iqn.2011-01.it.tekno-soft:xen.vm.Ubuntu-lun-4'].
[2013-03-04 19:37:12 875] DEBUG (XendDomainInfo:2869) 
_initDomain:shadow_memory=0x0, memory_static_max=0x40000000,
memory_static_min=0x0.
[2013-03-04 19:37:12 875] INFO (image:186) buildDomain os=linux dom=3 vcpus=2
[2013-03-04 19:37:12 875] DEBUG (image:725) domid          = 3
[2013-03-04 19:37:12 875] DEBUG (image:726) memsize        = 1024
[2013-03-04 19:37:12 875] DEBUG (image:727) image          = 
/var/run/xend/boot/boot_kernel.o0xcMQ
[2013-03-04 19:37:12 875] DEBUG (image:728) store_evtchn   = 1
[2013-03-04 19:37:12 875] DEBUG (image:729) console_evtchn = 2
[2013-03-04 19:37:12 875] DEBUG (image:730) cmdline        = 
root=UUID=e4aca1a8-2267-4709-99d5-557b9c49cda2 ro   quiet
splash $vt_handoff
[2013-03-04 19:37:12 875] DEBUG (image:731) ramdisk        = 
/var/run/xend/boot/boot_ramdisk.j3pLJu
[2013-03-04 19:37:12 875] DEBUG (image:732) vcpus          = 2
[2013-03-04 19:37:12 875] DEBUG (image:733) features       =
[2013-03-04 19:37:12 875] DEBUG (image:734) flags          = 0
[2013-03-04 19:37:12 875] DEBUG (image:735) superpages     = 0
[2013-03-04 19:37:12 875] ERROR (XendDomainInfo:2933) 
XendDomainInfo.initDomain: exception occurred
Traceback (most recent call last):
  File "/usr/lib64/python2.7/site-packages/xen/xend/XendDomainInfo.py", line 
2904, in _initDomain
    channel_details = self.image.createImage()
  File "/usr/lib64/python2.7/site-packages/xen/xend/image.py", line 169, in 
createImage
    return self.createDomain()
  File "/usr/lib64/python2.7/site-packages/xen/xend/image.py", line 188, in 
createDomain
    result = self.buildDomain()
  File "/usr/lib64/python2.7/site-packages/xen/xend/image.py", line 1081, in 
buildDomain
    rc = LinuxImageHandler.buildDomain(self)
  File "/usr/lib64/python2.7/site-packages/xen/xend/image.py", line 749, in 
buildDomain
    superpages     = self.superpages)
Error: (2, 'Invalid kernel', 'elf_xen_note_check: ERROR: Will only load images 
built for the generic loader or Linux
images')
[2013-03-04 19:37:12 875] ERROR (XendDomainInfo:488) VM start failed
Traceback (most recent call last):
  File "/usr/lib64/python2.7/site-packages/xen/xend/XendDomainInfo.py", line 
474, in start
    XendTask.log_progress(31, 60, self._initDomain)
  File "/usr/lib64/python2.7/site-packages/xen/xend/XendTask.py", line 209, in 
log_progress
    retval = func(*args, **kwds)
  File "/usr/lib64/python2.7/site-packages/xen/xend/XendDomainInfo.py", line 
2936, in _initDomain
    raise VmError(str(exn))
VmError: (2, 'Invalid kernel', 'elf_xen_note_check: ERROR: Will only load 
images built for the generic loader or Linux
images')
[2013-03-04 19:37:12 875] DEBUG (XendDomainInfo:3077) XendDomainInfo.destroy: 
domid=3
[2013-03-04 19:37:12 875] DEBUG (XendDomainInfo:2402) Destroying device model
[2013-03-04 19:37:12 875] DEBUG (XendDomainInfo:2409) Releasing devices
[2013-03-04 19:37:12 875] ERROR (SrvBase:88) Request start failed.
Traceback (most recent call last):
  File "/usr/lib64/python2.7/site-packages/xen/web/SrvBase.py", line 85, in 
perform
    return op_method(op, req)
  File "/usr/lib64/python2.7/site-packages/xen/xend/server/SrvDomain.py", line 
77, in op_start
    return self.xd.domain_start(self.dom.getName(), paused)
  File "/usr/lib64/python2.7/site-packages/xen/xend/XendDomain.py", line 1070, 
in domain_start
    dominfo.start(is_managed = True)
  File "/usr/lib64/python2.7/site-packages/xen/xend/XendDomainInfo.py", line 
474, in start
    XendTask.log_progress(31, 60, self._initDomain)
  File "/usr/lib64/python2.7/site-packages/xen/xend/XendTask.py", line 209, in 
log_progress
    retval = func(*args, **kwds)
  File "/usr/lib64/python2.7/site-packages/xen/xend/XendDomainInfo.py", line 
2936, in _initDomain
    raise VmError(str(exn))
VmError: (2, 'Invalid kernel', 'elf_xen_note_check: ERROR: Will only load 
images built for the generic loader or Linux
images')

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