Overlay windows occasionally appear on top of the user's PCoIP session to display pertinent information when the status changes—e.g., when the network connection is lost or an unauthorized USB device is plugged in. These overlays show network, USB device, and monitor statuses as icons and text, as shown in the examples below.
This overlay only displays on Tera2 clients that contain DisplayPort display interfaces (as opposed to DVI interfaces). The DisplayPort protocol requires a link training sequence for adapting to differing cable lengths and signal qualities. If this training does not succeed, the following overlay appears with the message "Display link training failed."
Display Link Training Failed Overlay
PCoIP technology is not compatible with half-duplex network connections. When a half-duplex connection is detected, the following overlay appears with the message "Half-duplex network connection."
Half Duplex Overlay
Loss of network connectivity is indicated using an overlay with the message "Network connection lost" over the most recent screen data. This overlay appears when the client network cable is disconnected or when no PCoIP protocol traffic is received by the client for more than two seconds.
Network Connection Lost Overlay
The lost network connection message appears until the network is restored or the timeout expires (and the PCoIP session ends).
Note: It is not recommended to use this notification message when using PCoIP devices with virtual desktops. Normal scheduling within the virtual desktop hypervisor can falsely trigger this message. To prevent this problem, you can disable the Enable Peer Loss Overlay setting.
This overlay displays on Tera2 clients only. Display resolution may have limitations due to resource constraints when all four ports have large displays connected. If the resolution limit is exceeded, the following overlay appears with the message "No support resolutions found. Please try unplugging other displays."
No Support Resolutions Found Overlay
When a user first logs into a PCoIP session, the following overlay appears with the message "Preparing desktop."
Preparing Desktop Overlay
If an unauthorized USB device is connected, the following overlay appears with the message "USB device not authorized." This overlay lasts for approximately five seconds.
USB Device Not Authorized Overlay
If the USB devices connected to the client cannot be handled by the USB ports, the following overlay appears with the message "USB over current notice." This overlay remains until USB devices are removed to meet the current handling of the USB ports.
USB Over Current Notice Overlay
Some USB devices cannot be connected through a high speed (USB 2.0) hub, and should instead be connected directly to the zero client or through a full speed (USB 1.1) hub. If such a device is connected to the zero client through a high speed hub, the following overlay appears with the message "USB device not supported behind high speed hub." This overlay lasts for approximately five seconds.
USB Device Not Supported Behind a High-speed Hub Overlay
If the resolution of a monitor connected to the client cannot be supported by the host, the monitor is set to its default resolution and the following overlay appears with the message "Resolution not supported."
Resolution Not Supported Overlay
Improper connection of the host video source is denoted by two possible overlays. These overlays appear for approximately five minutes. The monitor is put into sleep mode approximately 15 seconds after they appear.
No Source Signal Overlay
Source Signal on Other Port Overlay