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[Gannet <1387140@xxxxxxxxxxxxxxxxxx>]

After installing python-qt4 and python-kde4 packages I was able to run
apport-collect command but at last it said that I currently running a
mainline kernel that must be reported to butzilla.kernel.org:
http://i.imgur.com/SOOehwC.png

** Tags added: apport-collected utopic

** Description changed:

  Since Linux 3.18 my VM fails to start. Trying it in virt-manager causes
  error message:
  
  Error during domain starting: Requested operation is not valid: network
  'default' is not active
  
  Traceback (most recent call last):
    File "/usr/share/virt-manager/virtManager/asyncjob.py", line 89, in cb_wrapper callback(asyncjob, *args, **kwargs)
    File "/usr/share/virt-manager/virtManager/asyncjob.py", line 125, in tmpcb callback(*args, **kwargs)
    File "/usr/share/virt-manager/virtManager/domain.py", line 1360, in startup self._backend.create()
    File "/usr/lib/python2.7/dist-packages/libvirt.py", line 999, in create if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
  libvirtError: Requested operation is not valid: network 'default' is not active
  
  Trying to start Virtual Network in connection parameters causes another
  error:
  
  Помилка під час спроби запуску мережі «default»: internal error: Failed
  to apply firewall rules /sbin/iptables --table filter --insert FORWARD
  --in-interface virbr0 --jump REJECT: iptables: No chain/target/match by
  that name.
  
  
  Traceback (most recent call last):
    File "/usr/share/virt-manager/virtManager/asyncjob.py", line 89, in cb_wrapper callback(asyncjob, *args, **kwargs)
    File "/usr/share/virt-manager/virtManager/asyncjob.py", line 125, in tmpcb callback(*args, **kwargs)
    File "/usr/share/virt-manager/virtManager/network.py", line 104, in start self._backend.create()
    File "/usr/lib/python2.7/dist-packages/libvirt.py", line 2820, in create if ret == -1: raise libvirtError ('virNetworkCreate() failed', net=self)
  libvirtError: internal error: Failed to apply firewall rules /sbin/iptables --table filter --insert FORWARD --in-interface virbr0 --jump REJECT: iptables: No chain/target/match by that name.
  
  In linux 3.17 all is working good.
  
  Kubuntu 14.10 x86_64
  Libvirt0: 1.2.9-0~14.10~ppa0
  Virt-manager: 1:1.1.0-0~14.10~ppa0
+ --- 
+ ApportVersion: 2.14.7-0ubuntu8
+ Architecture: amd64
+ CurrentDesktop: KDE
+ DistroRelease: Ubuntu 14.10
+ InstallationDate: Installed on 2014-06-08 (143 days ago)
+ InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.1)
+ Package: linux (not installed)
+ ProcCmdline: BOOT_IMAGE=/@/boot/vmlinuz-3.18.0-031800rc2-generic root=UUID=b76fc0ae-d31c-4b13-8f4e-424542d850c9 ro rootflags=subvol=@ quiet splash vt.handoff=7
+ ProcVersionSignature: Error: [Errno 2] Немає такого файла або каталогу: '/proc/version_signature'
+ Tags:  utopic utopic
+ Uname: Linux 3.18.0-031800rc2-generic x86_64
+ UnreportableReason: The running kernel is not an Ubuntu kernel
+ UpgradeStatus: Upgraded to utopic on 2014-10-24 (5 days ago)
+ UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo
+ _MarkForUpload: True
+ modified.conffile..etc.libvirt.qemu.conf: [inaccessible: [Errno 13] Відмовлено у доступі: u'/etc/libvirt/qemu.conf']

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https://bugs.launchpad.net/bugs/1387140

Title:
  Linux 3.18: VM fails to start because of unactive virtual network

Status in “libvirt” package in Ubuntu:
  Confirmed
Status in “linux” package in Ubuntu:
  Confirmed

Bug description:
  Since Linux 3.18 my VM fails to start. Trying it in virt-manager
  causes error message:

  Error during domain starting: Requested operation is not valid:
  network 'default' is not active

  Traceback (most recent call last):
    File "/usr/share/virt-manager/virtManager/asyncjob.py", line 89, in cb_wrapper callback(asyncjob, *args, **kwargs)
    File "/usr/share/virt-manager/virtManager/asyncjob.py", line 125, in tmpcb callback(*args, **kwargs)
    File "/usr/share/virt-manager/virtManager/domain.py", line 1360, in startup self._backend.create()
    File "/usr/lib/python2.7/dist-packages/libvirt.py", line 999, in create if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
  libvirtError: Requested operation is not valid: network 'default' is not active

  Trying to start Virtual Network in connection parameters causes
  another error:

  Помилка під час спроби запуску мережі «default»: internal error:
  Failed to apply firewall rules /sbin/iptables --table filter --insert
  FORWARD --in-interface virbr0 --jump REJECT: iptables: No
  chain/target/match by that name.

  
  Traceback (most recent call last):
    File "/usr/share/virt-manager/virtManager/asyncjob.py", line 89, in cb_wrapper callback(asyncjob, *args, **kwargs)
    File "/usr/share/virt-manager/virtManager/asyncjob.py", line 125, in tmpcb callback(*args, **kwargs)
    File "/usr/share/virt-manager/virtManager/network.py", line 104, in start self._backend.create()
    File "/usr/lib/python2.7/dist-packages/libvirt.py", line 2820, in create if ret == -1: raise libvirtError ('virNetworkCreate() failed', net=self)
  libvirtError: internal error: Failed to apply firewall rules /sbin/iptables --table filter --insert FORWARD --in-interface virbr0 --jump REJECT: iptables: No chain/target/match by that name.

  In linux 3.17 all is working good.

  Kubuntu 14.10 x86_64
  Libvirt0: 1.2.9-0~14.10~ppa0
  Virt-manager: 1:1.1.0-0~14.10~ppa0
  --- 
  ApportVersion: 2.14.7-0ubuntu8
  Architecture: amd64
  CurrentDesktop: KDE
  DistroRelease: Ubuntu 14.10
  InstallationDate: Installed on 2014-06-08 (143 days ago)
  InstallationMedia: Kubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.1)
  Package: linux (not installed)
  ProcCmdline: BOOT_IMAGE=/@/boot/vmlinuz-3.18.0-031800rc2-generic root=UUID=b76fc0ae-d31c-4b13-8f4e-424542d850c9 ro rootflags=subvol=@ quiet splash vt.handoff=7
  ProcVersionSignature: Error: [Errno 2] Немає такого файла або каталогу: '/proc/version_signature'
  Tags:  utopic utopic
  Uname: Linux 3.18.0-031800rc2-generic x86_64
  UnreportableReason: The running kernel is not an Ubuntu kernel
  UpgradeStatus: Upgraded to utopic on 2014-10-24 (5 days ago)
  UserGroups: adm cdrom dip libvirtd lpadmin plugdev sambashare sudo
  _MarkForUpload: True
  modified.conffile..etc.libvirt.qemu.conf: [inaccessible: [Errno 13] Відмовлено у доступі: u'/etc/libvirt/qemu.conf']

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