The viewer never gets any screen updates.
Options m_Shared only seems to be used to send clientInitShared flag to the server, but if that flag isn't sent, the viewer still doesn't get updates (so the problem is on viewer).
I've looked at every use of m_Shared, but it must affect something else to cause this problem.
After more 2 000 000 (two million) views on forum for 1.5.0.x development versions... and 1.6.1.0, 1.6.3.0-dev versions
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A new stable version, UltraVNC 1.6.4.0 and UltraVNC SC 1.6.4.0 have been released: https://forum.uvnc.com/viewtopic.php?t=38095
Feedback is always welcome
2025-12-05: Celebrating the 23th anniversary of the UltraVNC (26th anniversary since the laying of the foundation stone): https://forum.uvnc.com/viewtopic.php?t=38130
2025-12-03: Could you please complete our poll/survey? Renaming UltraVNC files and service to be more clear: https://forum.uvnc.com/viewtopic.php?t=38128
There was a problem to vote, it is solved now! Thanks in advance!
2025-12-02: We need help: English Wikipedia UltraVNC page has been requested to deletion: https://forum.uvnc.com/viewtopic.php?t=38127
Any help is welcome to improve the UltraVNC page and/or to comment on the Wikipedia Talk page
2025-05-06: Forum password change request: https://forum.uvnc.com/viewtopic.php?t=38078
2023-09-21: Important: Please update to latest version before to create a reply, a topic or an issue: https://forum.uvnc.com/viewtopic.php?t=37864
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Viewer is blank when you disable "Share the Server" option
- Rudi De Vos
- Admin & Developer

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Re: Viewer is blank when you disable "Share the Server" opti
confirmed
checking for solution
checking for solution
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- Rudi De Vos
- Admin & Developer

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Re: Viewer is blank when you disable "Share the Server" opti
Found
[_]shared server
set
0 reconnect attemps and 0 timeout
0 timeout cause the viewer the quit the update loop on start.
// sf@2007 - AutoReconnect
// Error, value can be set 0 by gui in that case you get a gray screen
if (m_autoReconnect==0) m_autoReconnect=1; <<<<<<<<<<<added in src to fix it.
while (m_autoReconnect > 0) <<<< update loop start
[_]shared server
set
0 reconnect attemps and 0 timeout
0 timeout cause the viewer the quit the update loop on start.
// sf@2007 - AutoReconnect
// Error, value can be set 0 by gui in that case you get a gray screen
if (m_autoReconnect==0) m_autoReconnect=1; <<<<<<<<<<<added in src to fix it.
while (m_autoReconnect > 0) <<<< update loop start
UltraVNC links (join us on social networks):
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- Website: https://uvnc.com/
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