Comment 16 for bug 1495983

Revision history for this message
Joseph Salisbury (jsalisbury) wrote : Re: [Hyper-V] kernel panic occurs when installing Ubuntu Server 15.10 x32

Hi Chris,

Thanks for the update. There is a Wily test kernel with the patch from comment #10 available at:
http://kernel.ubuntu.com/~jsalisbury/lp1495983/patched-kernel/wily/

This won't allow you to test the fix as it will be in the iso, but at least it will test the patch with the latest Wily kernel and it should prevent the panic.(Note you would probably also see the panic by just trying to boot with the latest x86 Wily kernel).

Are you referring to the following initial patch that broke the 32bit installation:

commit be0cf6ca301c61458dc4aa1a37acf4f58d2ed3d6
Author: K. Y. Srinivasan <email address hidden>
Date: Fri Mar 27 00:27:20 2015 -0700

    scsi: storvsc: Set the tablesize based on the information given by the

That commit is now in Trusty(As of Ubuntu-3.13.0-60) and Vivid(As of Ubuntu-3.19.0-23) and is causing a similar panic. That commit was also added to Trusty and Vivid per bug 1445195 . Not only does the panic happen at install time, but when ever I try to boot a 32bit kernel for Trusty, Vivid or Wily.

The patch mentioned in comment #10 does in fact fix the panic for Vivid and Wily. However, it does not fix the panic for Trusty. Would it be possible for you to test the latest Trusty and Vivid test kernels to see if you also get this same panic? The kernels can be downloaded from:

Trusty: https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/7925457
Vivid: https://launchpad.net/~canonical-kernel-team/+archive/ubuntu/ppa/+build/7925789

Another test would could try is to install Vivid or Trusty using the iso, then install the latest kernel to see if it starts to cause the panic.