You dump the first gigabyte of the physical memory of a guest VM in KVM
by Ctrl+Alt+2 and 'pmemdump 0 1073741824 memdump'

The only log message appearing there after I 'sudo reboot' is

    Oct 23 06:02:18 ubuntu-gnome rsyslogd: [origin software="rsyslogd"
swVersion="7.4.4" x-pid="1022" x-info="http://www.rsyslog.com";] exiting
on signal 15.

I enabled full SysRq with 'echo 1 > /proc/sys/kernel/sysrq' before
attempting sudo reboot.  Unfortunately alt-sysrq-t/w showed absolutely
nothing.

Alt-SysRq+E produced the following messages on /dev/tty1:

    [  150.506887] SysRq : Terminate All Tasks
    [  150.507817] init: rc main process (3232) killed by TERM signal
    [  150.508340] init: plymouth-shutdown main process (3297) killed by TERM 
signal

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https://bugs.launchpad.net/bugs/1384095

Title:
  Fails to reboot after installing Ubuntu GNOME 14.10 release candidate
  in KVM

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