VDI screen saver not working

Citrix XenDesktop 7.6.300 environment.

Configured GPO:

Problem:

Screen Saver not kicking in on a Windows 7 VDI.

Troubleshooting:

Check what processes are using the power configuration of the display:

C:\Windows\system32>powercfg requests
DISPLAY:
[PROCESS] \Device\HarddiskVolume1\Program Files\Citrix\ICAService\GfxMgr.exe

SYSTEM:
[PROCESS] \Device\HarddiskVolume1\Program Files\Citrix\ICAService\PicaSessionAgent.exe

AWAYMODE:
None.

Solution:

Added register key to the GPO:

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\PowerRequestOverride\Process]
“GfxMgr.exe”=dword:00000001