We get an error when using the Dell Wyse Z90DE7. There is an extra video card (Matrox Epica TC20 +) installed. We have 6 of these thin clients purchased to use in a production environment at one of our customers. They use the thin clients to connect to a virtual machine with RDP.
The problem is that approximately every day one of the thin clients gets the error message: "Because of a protocol error this session will be disconnected please try connecting to remote computer again". After closing the RDP connection the operator must manually start a new connection.
I already looked up this error message on the web and forums, but without an usable solution. Also, a month ago I have opened a support case on the website of Wyse (support.wyse.com/.../ibuhpage.jsp) and contacted our supplier. The supplier already gave a solution, but also that didn't work.
Information about the setup: - 6x Dell Wyse Z90DE7 with Matrox Epica TC20 + - Firmware version: v9.04 B858 - There are 4 monitors conntected to each client (with three DVI and one VGA) - They connect with RDP to a virtual machine. The VM OS is Windows 7 Enterprise SP1 64bit. - Everything is connected directly to a Cisco 2960
We also have a desktop PC at the customer to test the RDP connection and this PC does not experience any problems.
Procedure we got from our supllier:
- Installation of the latest WES7 build which can be downloaded here (choose number 10 download, build 858) - Installation of latest NIC driver version which can be downloaded here (choose for Win7 and Server 2008 R2) - Installation of the latest RDP client which can be downloaded here. When WDM is not used you have to go through the following steps: o login as Administrator with the FBWF disabled (icon is red) o unpack the RDP8.1 download in c:\temp of the thin client o run the following commands in a command prompt: "wusa.exe c:\Temp\Windows6.1-KB2574819-v2-x86.MSU /quiet /norestart" "wusa.exe c:\Temp\Windows6.1-KB2857650-x86.msu /quiet /norestart" "wusa.exe c:\Temp\Windows6.1-KB2830477-x86.msu /quiet /norestart" "wusa.exe c:\Temp\Windows6.1-KB2913751-x86.msu /quiet /norestart" - Reboot the thin client and remove after the reboot the contents of c:\Windows\SoftwareDistribution\Download