The AltGr key does not work on a Linux virtual machine on a Windows Server 2008-based server that has the Hyper-V role enabled

Prerequisites

You must have Windows Server 2008 with the Hyper-V role installed to apply this hotfix.

Restart Requirement

You have to restart the computer after you apply this hotfix.

Hotfix Replacement Information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later) that are listed in the following table. The dates and times for these files are listed in coordinated universal time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.

Windows Server 2008 file information note

The MANIFEST files (.manifest) and MUM files (.mum) installed for each environment are
listed separately
. MUM and MANIFEST files, and the associated security catalog (.cat) files, are critical to maintaining the state of the updated component. The security catalog files (attributes not listed) are signed with a Microsoft digital signature.

Windows Server 2008 X64

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
To resolve the issue, follow these steps:

1. Install the hotfix 963709.

2. Under the following registry key, add a registry entry named "KeyboardWorkaroundEnabled," set the type to REG_DWORD, and then set the value to 1:

   HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Virtualization\Worker

Note After you install the hotfix and then create the new registry entry, the Windows Server 2008-based system removes the left CTRL scan code when it is followed by a right ALT scan code. However, this may affect intentional left CTRL + right ALT key combinations. To work around this issue, hold down the left CTRL key for a few seconds before you hold down the right ALT key.