kernel-packages team mailing list archive

[Dexuan Cui <decui@xxxxxxxxxxxxx>]

This is caused by a bug kernel API used by recent hyper-v synthetic
network driver in Ubuntu 14.04 (Ubuntu 13.10 is not affected).

This only affects 32-PAE Linux VM when the VM has more-than-about-4GB
memory.

I have fixed the issue:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d1cd1210834649ce1ca6bafe5ac25d2f40331343

Please pull the fix into the future releases.

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https://bugs.launchpad.net/bugs/1338185

Title:
  networking fails in 32-bit 14.04 using HyperV on Win2012R2

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I was running Ubuntu 13.10 32-bit as a VM on a Windows Server 2012 R2
  machine with Hyper-V.  In 32-bit 13.10, networking worked properly at
  all times, from the first installation to normal usage.

  I ran the upgrade to 32-bit Ubuntu 14.04 and discovered that
  networking is no longer working.

  To eliminate the possibility that there was a botched upgrade, I tried
  a fresh install in another VM.

  I performed a fresh install of 32-bit Ubuntu 14.04 in Hyper-V from
  ubuntu-14.04-desktop-i386.iso, and I noticed that the network was not
  connecting during the first part of the installation before any files
  are copied to the disk.  After the installation completed, there was
  no eth0 device present.

  By comparison, I performed a fresh install of 64-bit Ubuntu 14.04 in
  Hyper-V from the ubuntu-14.04-desktop-amd64.iso, and networking worked
  properly at all times from the start of installation.

  To summarize, networking is failing in 32-bit Ubuntu 14.04 under
  Hyper-V in Windows Server 2012 R2.  Networking is working properly in
  32-bit Ubuntu 13.10 on the same machine.  Networking is working
  properly in 64-bit Ubuntu 14.04 on the same machine.

  Any suggestions on getting 32-bit Ubuntu 14.04 to work in my Hyper-V
  VM ?

  Thanks.

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