If you are configuring multi-monitor end user stations to connect to Citrix XenDesktop virtual desktops, you may find blank/black spaces on the some or all of the monitors…something like this:
On the VDI image, I installed the Citrix 7.14 VDA. Thus, to resolve this issue I did the following:
- Open the registry (regedit) and navigate to:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\vbdenum - Increase the value of “MaxVideoMemoryBytes” REG_DWORD value. Now if you read the CTX article linked below (and you should), there’s a formula you could complete to determine the exact amount of video memory required. I simply estimated 64mb per monitor times 4 monitors and changed the value to 268435456.
- Reboot the VDA
Now, in this particular instance, I had deployed Citrix App Layering to build layers and image templates for use with MCS…I made this registry change in my XenDesktop platform layer, published a new image template, updated my machine catalogs, and upon testing my display issues were resolved.
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