I may have got some hints about reproducible gray UVNC Viewer screen issue:
Scenario:
Windows Vista 64 Home Premium SP2, UAC active, normally run under limited account, having admin access too.
Comodo Internet Security suite ( SPFW + HIPS only, UVNC binaries set as system applications ), Avast Free AV
Computer with public IP and hostname.
Fresh UVNC 1.1.8 x64 default full install of 1.1.8 server+viewer, using mirror driver
UVNC Server running as service, UVNC Viewer running under limited account
Steps to reproduce:
Both viewer and server are running on the same machine, Viewer is connecting to server via machine public hostname or IP
Server is set to VNC 8char authentication - Connection and remote control works as expected.
Both Server and Viewer are set to use encryption plugin (64b)
http://adamwalling.com/SecureVNC/, using 19char long PW pass-phrase and default AES 256b + 256b key settings
Connection and remote control works as expected.
Viewer is told to generate auth key pair and both V/S are provided by particular key.
*I think* for now worked as expected, but I have to verify, but not going to break things now, using it remotely.
Server is told to use MS logon authentification - new version ( type II ??) , In MS logon is verified both my admin account and limited account have set full access.
Logged in using limited windows account logon
Connection info says encrypted connection is established
Some hundreds of bytes passed by both directies, but than data exchange stops
Screen remains gray.
Screen remains gray, even if I revert configuration changes
- cancelling MS logon
- cancelling keys usage
- cancelling encryption plugin usage on both sides.
These steps to reproduce were originally noticed on UVNCViewer 1.1.8 on remote XP SP3 32bit, connecting to this Vista 64 computer.
Uninstalling + reinstalling UVNC - ( no extra manual cleaning), using basic configuration with VNC authentification fixed the problem.
Adding SecureVNC plugin with default setings + passphrase keeps it working too.
Dedicated thread for the following issue for 1.1.8
C2D E4700 / 6 GB RAM / Vista x64 HPremium SP2 / UAC active / Public IP / Comodo CIS ( FW+HIPS only) / Avast Free /