terminal_services >> Terminal Server client display issues

by RnJvemVuU291bA » Fri, 11 May 2007 00:31:01 GMT

This one has me puzzled and I'm hoping someone can provide some insight
&/or suggestions on where to look next.

We have a Terminal Server (Windows Server 2003 EE R2 sp2, 2 dual core
Xeons, 8 gigs of ram) which usually has about 8-10 users on it. They connect
to the TS primarily to run a couple custom applications (written in
Powerbuilder) and Word 2000, Excel 2000, Outlook 2003 as well. The client
pc's are a mixture of windows 2000 and windows XP, and RDP 5.2 and 6.0.

When a user is remotely running an application sometimes elements are not
'drawn'. For example, a screen that has 5 buttons on it will have one of the
buttons and its text missing. Everything will be spaced out correctly
If the users click where the button should be, the button will appear,
they will have to click it again to press the button, this results in a lot
of frustration and extra clicks.

Additional symptoms:
Once this issue happens with a button, it seems to happen more frequently
with that specific button.
The issue isn limited to buttons, in some screens tables and other forms
are drawn but appear blank.
The longer the server has been running the worse the problem is. (In the #
of items that are not drawn right, and the frequency they are not drawn).
The problem mostly manifests in the powerbuilder applications; they are
also the most used applications on the server. But has shown up in the
office applications, and the 'Task Manager' was missing its upper right Close
'X' Button.
When there is a problem with an object, everyone seems to have a problem
with it, no matter what client OS, or RDP version.
The problem never happens when logged in locally on the server. Only when
connecting remotely.
Rebooting the server clears up the problem for a bit (day or two) and
after it been running for about a 7-10 days it to the point where users
say it unusable.
The issue was first noticed in February, but was a very rare occurrence.
It is happening much more frequently now.

Troubleshooting steps taken Wee tried different RDP versions 5.2 and 6.0 on 2000 and XP.
Turning off bitmap caching on the clients. (Along with most of the other
client settings such as color depth and sounds)
Deleting the RDP cache file on the client :\Documents and
Settings\username\Local Settings\Application Data\Microsoft\Terminal Server
Client\Cache\*.bmc Running Perfmon and looking at the errors counters under erminal
Services Sessionthey all are at 0.

Thanks in advance for your input.

terminal_services >> Terminal Server client display issues

by Benny Tritsch [MVP] » Sat, 12 May 2007 02:07:58 GMT

What is the screen resolution of your RDP connections? Is it beyond 1,600 x
1,200? If yes, this may be the reason for "losing" graphics items. It may be
a video buffer overflow issue.


Bernhard Tritsch
MVP Windows Server - Terminal Server
Author of "Windows Server 2003 Terminal Services", MS Press

terminal_services >> Terminal Server client display issues

by RnJvemVuU291bA » Sat, 12 May 2007 05:10:00 GMT

hanks for the response :)

Most of the clients are 1024x768 or 800x600 with 16bit color.

as a test I've also setup IIS on a diffrent server with TSweb and the
problem shows up in the activeX rdp control as well ( which is rdp version
5.2 i believe. )

On a fresh XP install, with a 5.1 client a user is saying the problem hasn't
shown up yet. Sooo I've looked for the 5.1 installation package [XPSP2
5.1.2600.2180 from
] to do more testing, but it looks like all refrences to it have been
replaced by the 6.0 client. So i tried the one in the adminpak.msi and it
turned out to be 5.2 that exhibited the same issues.

"Benny Tritsch [MVP]" wrote:

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