Comment 3 for bug 562787

My guess is that vmbuilder is writing 'hwcap 0 nosegneg' is written by vmbuilder because of bug 246625 and other similar/duplicate bugs there. However, as far as I can tell there is no affect of writing that file other than that it breaks the upgrade as I reported here.

Ie:

$ sudo rm /etc/ld.so.conf.d/libc6-xen.conf
$ sudo /sbin/ldconfig
$ sudo reboot
...
$ sudo do-release-upgrade -d

The reboot are just to show a generally functional system after removal of that file (also shown by the ablility to do-release-upgrade).

The do-release-upgrade finished successfully. A reboot of the system is a bad idea, though on ec2 as the old kernel simply isn't going to work for upstart/mountall/udev of lucid.