Our XenDesktop 7.6 image (Win7 32-bit) running on XenServer 6.5 SP1 with NVIDIA K1 GPU (K120Q) is experiencing an issue where explorer.exe process constantly occupies 5-10% CPU and the process hangs for a fraction of a second every 2 seconds or so. This causes the start menu and other explorer functions to appear to “lag” and users complain their session is slow. After some time (usually 1-2 hours), Explorer goes back to normal. Disabling the NVIDIA card/driver gets rid of the issue and I can confirm with Process Monitor/Explorer that it has something to do with the NVIDIA GPU. I’ve done some dumps with procdump I’m happy to share, but unable to decipher much else myself. I’ve tried multiple versions of the driver as well - the current one we use is 348.27.
The issue does not occur if we log directly in to the console of the VDA (for example, in XenCenter). It only happens when logging in via Citrix Receiver, from both Wyse Xenith Pro 2 and Windows desktops.
Can anyone confirm if their own XenDesktop + K120Q setup exhibits the same CPU usage on explorer.exe?