KVM Windows virtual machines and ACPI unattended shutdown: a recap

Written by Super User on . Posted in Virtualization

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ACPI results with policy/registry changes and disabled login screensaver/screen sleep

What about disabling the login screen saver (WinXP/2003) or login screen sleep (Win7/2008R2+)?

Windows version Console OFF long idle (3) Console OFF Console ON Console login Terminal Server login Locked session
Windows XP yes yes yes yes no (1,4) no (1,4)
Windows 2003R2 yes yes yes yes yes no
Windows 7 yes yes yes yes yes no
Windows 2008R2 yes yes yes yes yes no
Windows 2012R2 yes yes yes yes yes no


  1. it requires manual console-based shutdown confirmation
  2. it require two ACPI shutdown events: the first one exits from the screensaver, the second one shutdown the machine
  3. long idle = login screen with screensaver or monitor sleep
  4. warning timeout not working on winxp: http://www.pcreview.co.uk/threads/how-to-disable-shutdown-warning-message.2688069/
  5. the screensaver is never exited, but as soon you move the mouse, a sudden shutdown happens
  6. Win7 / 2008R2 / 2012R2 do not appear to have a login screensaver by default. Rather they put monitor to sleep, by default. To enable login screensave, give a look at https://support.microsoft.com/en-us/kb/185348

The two-ACPI-events-for-shutdown behavior is now gone. On the other hand, locked session remain, well, locked and (almost) totally unresponsive to shutdown events.

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