VNC® Free Edition 4.0 - known bugs and features
The following are known bugs, features and omissions in VNC Free Edition 4.0.
| Date | ID | Platform / Program | Description | Workaround | Status |
|---|---|---|---|---|---|
| 11 Jun 2004 | 1 | Windows server | The IP addresses displayed by the tray icon are not refreshed when the host IP addresses change. | Logoff and back on again, or restart the VNC server, to cause them to be refreshed. | Fixed in VNC Enterprise Edition 4.0 and VNC Free Edition 4.1 |
| 6 Jul 2004 | 2 | Windows server | If the DisconnectAction setting is set to Logoff the workstation, and there is no user logged in when the last client disconnects, then the workstation will instead shutdown. This behaviour affects Windows NT/2000 systems, and does not affect Windows XP/2003. | Do not set DisconnectAction to Logoff the workstation. | Fixed in VNC Enterprise Edition 4.0 and VNC Free Edition 4.1 |
| 6 Jul 2004 | 3 | Windows server | When used with certain input-only VNC viewers (e.g. x2vnc, Win2VNC), mouse and keyboard can stop responding when a screen-saver appears or when the workstation is locked. This behaviour only affects Windows NT/2000/XP/2003 systems. | None. | Fixed in VNC Enterprise Edition 4.0 and VNC Free Edition 4.1 |
| 12 Jul 2004 | 4 | Windows server | When Ctrl-Alt-Del is sent remotely to the VNC server, causing the Logon dialog to be shown, the username and password fields may appear grayed out. This behaviour has only been reported under Windows 2003 systems. | Cancel the Logon dialog and send Ctrl-Alt-Del again. | Under investigation |
| 13 Jul 2004 | 5 | All servers | If the IdleTimeout parameter is set to zero, indicating no timeout, then broken or stalled network connections can cause the VNC server to hang. | Set IdleTimeout to 2000000 seconds (approximately 23 days), instead of zero. | Fixed in VNC Enterprise Edition 4.0 and VNC Free Edition 4.1 |
| 15 Jul 2004 | 6 | Windows server | The viewer may not be refreshed immediately when switching between desktops. This affects Windows NT/2000/XP/2003. | Use Refresh Screen from the VNC viewer menu to force a refresh, or wait for background polling to refresh the viewer. | Fixed in VNC Enterprise Edition 4.0 and VNC Free Edition 4.1 |
| 19 Jul 2004 | 7 | Windows server | The User-Mode VNC server settings may have their permissions incorrectly set if the user is logged on to a domain and the local machine has a user account with the same user name. This affects Windows NT/2000/XP/2003. | Ensure that no local account exists with the same user name as the domain account. | Fixed in VNC Enterprise Edition 4.0 and VNC Free Edition 4.1 |
| 28 Aug 2004 | 8 | Windows server | VNC server for Windows will quit unexpectedly if more than 61 connections are received at the same time. | Avoid exposing this release of the VNC server directly to untrusted networks, through use of the LocalHost option and tunnelling protocols such as SSH. | Fixed in VNC Enterprise Edition 4.0 and VNC Free Edition 4.1 |
| 1 Sep 2004 | 9 | Windows server | The Control and Alt keys can become "stuck" when the Send Ctrl-Alt-Del command is used remotely. | Press and release each key a couple of times from a new viewer session, to cause the server to reset the keys' states. | Under consideration |
| 1 Sep 2004 | 10 | Windows viewer | When Fullscreen mode is selected via the F8 menu, the Windows taskbar can remain on top of the VNC viewer window. | Use the system menu (accessible via the icon at the top left
of the VNC viewer window) to enter Fullscreen mode - the bar will
then dissappear after a short delay. or Click on the taskbar, then back on the VNC viewer window - the bar will dissappear. |
Under consideration |
| 28 Sep 2004 | 11 | Windows server | The Desktop wallpaper, pattern and UI effects removal features do not take effect when the workstation is locked, on the Windows NT 4 and Windows 2000 platforms. More recent Windows platforms are not affected. | No workaround | Fixed in VNC Enterprise Edition 4.1.3 and VNC Free Edition 4.1 |
| 12 Nov 2004 | 12 | Server (all platforms) | If the VNC server is remoting an unusually wide desktop (i.e. one exceeding about 2000 pixels wide, at 32bpp) then the connection may be dropped at seemingly random intervals with the "ZRLE: not enough space for first line?" error message. | Use the Hextile encoding. If ZRLE must be used, reduce the desktop width and/or color depth. | Fixed in VNC Enterprise Edition 4.0 and VNC Free Edition 4.1 |
| 03 Dec 2004 | 13 | Windows viewer | If the VNC viewer is minimized and the Options item is then selected from the VNC viewer taskbar entry's menu, then the Options dialog is not visible on-screen and the VNC viewer appears to hang. | If Options is selected in this way, press Escape immediately, before clicking on or selecting any other window. This will close the (invisible) Options dialog and return control to the VNC viewer. | Fixed in VNC Enterprise Edition 4.1.3 and VNC Free Edition 4.1 |
| 28 Feb 2005 | 14 | Server (all platforms) | Connection fails if the size of the remote desktop changes during the authentication stage. | Connect to the server again. | Fixed in VNC Enterprise Edition 4.1.3 and VNC Free Edition 4.1 |
| 28 Feb 2005 | 15 | UNIX server | Long-running UNIX VNC servers stop sending automatic graphical updates. Moving the mouse pointer causes missing updates to be sent. | Use vncconfig to set the AlwaysSetDeferUpdateTimer
option to 1, then set it back to 0. |
Fixed in VNC Enterprise Edition 4.1.3 and VNC Free Edition 4.1 |
| 28 Feb 2005 | 16 | UNIX server | Certain applications display with the wrong colors, are all black or crash the Xvnc process when run. This problem occurs when non-default TrueColor visuals are used. | No workaround. | Fixed in VNC Enterprise Edition 4.1.3 and VNC Free Edition 4.1 |
| 28 Feb 2005 | 17 | UNIX server | The Xvnc process crashes if the UseLocalCursor
option is enabled and the X cursor is empty. |
Disable the UseLocalCursor option. |
Fixed in VNC Enterprise Edition 4.1.3 and VNC Free Edition 4.1 |
If you encounter a bug with VNC Free Edition 4.0, please upgrade to the latest release.