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[volker kempter <1387140@xxxxxxxxxxxxxxxxxx>]

boot problems with 3.18:

an observation which may be related to the described problem: 
using kernel 3.18-rc2-vivid (or any other 3.18 kernel published so far!) in lubuntu-14.10 x86 32bit the machine does not come up correctly. In particular, it comes up without WIFI. Moreover, "sudo" does not work, and synaptic cannot be used. 

Kernels 3.17 and 3.16 show no problems.

On the other hand, If I run 14.10 with kernel 3.17, I can boot a
lubuntu-14.10 VM  in virtualbox  with kernel 3.18 without any problems.

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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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