VNC viewer keeps crashing

VNC viewer keeps crashing

Postby wavesailor » 2011-08-13 14:05


I'm using Ultra VNC view under Win XP-SP-3 to connect to Windows Vista Ultra VNC Server but the view keeps crashing.
What can I do to resolve this?


Posts: 2
Joined: 2008-05-26 17:52

Re: VNC viewer keeps crashing

Postby jraley » 2012-02-17 22:40

I am having the same problem but with Win7 x64 connecting to another Win7 x64. The connection drops every 2 minutes, almost like clockwork. I have also noticed that when you hover the mouse over the UltraVNC Server icon in the task bar (notification area) it has a strange IP address or it will have the IP address with extra numbers at the end. When this is happening, I cannot stay connected for longer than two minutes. If I restart the service or the PC, it usually clear the problem, unless UltraVNC server begins displaying the incorrect IP address again. This is happening in both x64 and x64.
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Joined: 2012-02-17 18:37

Re: VNC viewer keeps crashing

Postby gyyrog » 2012-05-08 15:43

Turns out this was happening on my system because of slow port negotiation. On my cisco spanning-tree portfast on the network port the VNC machine was connected to fixed the problem
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Joined: 2012-05-07 16:17

Re: VNC viewer keeps crashing

Postby gregg0938 » 2012-07-11 15:01

I'm having the same problem where the viewer session appears to disconnect after a few minutes when connecting to Vista and Win 7 PCs. Rebooting the my PC and the target PC does not help. It appears to be more oriented towards 64bit systems. I have it happening at numerous customers with different types of network switches and routers. There doesn't appear to be any other common factor.
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Joined: 2012-07-11 14:39

Re: VNC viewer keeps crashing

Postby Prisma » 2012-08-10 13:16

gyyrog wrote:Turns out this was happening on my system because of slow port negotiation.

We had a problem with one customer using internet via satellite. The viewer crashed (closed immediately without any error pop up) 4-8 times before a connection could be established. Once the connection was established it was stable. Sounds similar...

(we use reverse connection via repeater)
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Joined: 2005-10-27 15:50

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