Secure Global Desktop 4.40 Administration Guide > Applications, Documents, and Application Servers > Can I Use Multihead Or Dual Head Monitors With SGD?

Can I Use Multihead Or Dual Head Monitors With SGD?

Yes you can use multihead or dual head monitors with SGD. However, if any of the applications are configured with a Window Type (--displayusing) that is set to Client Window Management you might have to amend your application and monitor configuration to be able to use multiple monitors.

You configure multiple monitors with Client Window Management as follows:

1. Disable shared resources.
2. Configure the correct desktop size.
3. Set up the monitors correctly.

Disabling Shared Resources

You disable shared resources as follows:

1. In the SGD Administration Console, click the Applications tab and select an application that is displayed on multiple monitors.
2. Click the Performance tab.
3. Deselect the Share Resources Between Similar Sessions check box.
4. Click Save.
5. Repeat these step for each application that is displayed on multiple monitors.

Alternatively, use the following command:

$ tarantella object edit --name obj --share true

Configuring the Correct Desktop Size

You must ensure that the SGD server sends the client enough space to display all the monitors on the desktop.

Note This increase the amount of memory used on the client device and on the SGD server.

You must configure your SGD servers so that they send the client the size of the entire desktop area, as shown by the "virtual screen" in the diagram below, and not just the size of the primary monitor.

For example, if the dimensions of Monitor 1 in the diagram are 1200 x 768 and the dimension of Monitor 2 are 800 x 600, then the desktop size that needs to be configured is 2000 x 768.

You configure the correct desktop size as follows:

1. In the SGD Administration Console, click the Secure Global Desktop Servers tab and select an SGD server.
2. Click the Protocol Engines » X tab.
3. For Client Window Size, type the dimensions in pixels of the virtual screen in the Maximum Height and Maximum Width fields.
4. Click Save.
5. Repeat these steps for each SGD server in the array.

Alternatively, use the following command:

$ tarantella config edit --array \
  --xpe-cwm-maxwidth pixels --xpe-cwm-maxheight pixels

Setting up the Monitors

You must set up the monitors so that all the secondary monitors are to the right of the primary monitor (see the diagram above). You have to do this because the X server cannot handle negative screen co-ordinates.

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