Article ID: 8758, created on Aug 17, 2010, last review on Aug 12, 2014

  • Applies to:
  • Virtuozzo containers for Windows

Symptoms

If the Parallels Containers host stops responding (freezes, hangs), requiring you to hard-reset it, you can generate the memory dump file manually and pass it to Parallels Support for further investigation. This article describes how to configure the server, including resetting it and generating a memory dump using the keyboard.

Resolution

This article is based on Microsoft article KB244139. The following two steps need to be configured to force a system crash from the keyboard:

1. If you want a crash dump file to be written, you must enable such dump files, choose the path and file name, and select the size of the dump file. For more information, see Enabling a Kernel-Mode Dump File.

2. Configure Keyboard Shortcuts to Force a System Crash from the Keyboard (the method depends on the type of keyboard connected to the system):

         - With PS/2 keyboards, you must enable the keyboard-initiated crash in the registry. In the registry key HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\i8042prt\Parameters, create a value named CrashOnCtrlScroll, and set it equal to a REG_DWORD value of 0x01.

         - With USB keyboards, you must enable the keyboard-initiated crash in the registry. In the registry key HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\kbdhid\Parameters, create a value named CrashOnCtrlScroll, and set it equal to a REG_DWORD value of 0x01.

Important: You must restart the system for these settings to take effect.

Note: The USB keyboard feature can be used in Windows Server 2008 if Service Pack 2 or later is installed, or by installing the following hotfix:
971284 A hotfix is available to enable CrashOnCtrlScroll support for a USB keyboard on a computer running Windows Vista S971284 or Windows Server 2008

After you enable the feature, you can generate a memory dump file by holding down the right CTRL key and pressing the SCROLL LOCK key two times. Then the dump should be forwarded to Parallels Support for investigation as described by this article.

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