Pat, If the cursor doesn't move at the server and you don't get any updates then this suggests that your network connection has been dropped. VNC will take a short while to detect this because it relies upon the TCP/IP stack to do so.
Regards, Wez @ RealVNC Ltd. > -----Original Message----- > From: Boland Pat-A19945 [mailto:[EMAIL PROTECTED] > Sent: 02 September 2005 15:21 > To: James Weatherall; vnc-list@realvnc.com > Subject: RE: Blank Screen Problem > > James: > I'm giving you a perfect illustration of my one-dimensional > thinking, sorry. No the cursor does not move and is not > visible at the > server when you move it at the viewer. > > Kind regards - Pat > > -----Original Message----- > From: James Weatherall [mailto:[EMAIL PROTECTED] > Sent: Friday, September 02, 2005 7:02 AM > To: Boland Pat-A19945; vnc-list@realvnc.com > Subject: RE: Blank Screen Problem > > Pat, > > I meant does the cursor move at the server when you move it at the > viewer when the screen being shown is all-black. > > Regards, > > Wez @ RealVNC Ltd. > > > > -----Original Message----- > > From: Boland Pat-A19945 [mailto:[EMAIL PROTECTED] > > Sent: 01 September 2005 23:06 > > To: James Weatherall; vnc-list@realvnc.com > > Subject: RE: Blank Screen Problem > > > > James: > > > > Very good question. Yes the mouse works, but instead of the > usual > > white arrow, I get a small (very small) white box as the cursor. > > I cannot tell if the keyboard is working as all I see is the black > > screen. > > > > I will look for logged errors in the application event log. > > > > Any viewer that connects sees the black screen unless the Server > is > > reset, according to how I explained before. > > > > Server is running XP most viewers are running XP too, > occasionally > > Win 2000 is used on the viewer side. No difference in the black > > screen problem. By the way I did turn off fast user switching, no > > effect. > > > > Kind regards - Pat > > > > -----Original Message----- > > From: James Weatherall [mailto:[EMAIL PROTECTED] > > Sent: Thursday, September 01, 2005 6:39 AM > > To: Boland Pat-A19945; vnc-list@realvnc.com > > Subject: RE: Blank Screen Problem > > > > Pat, > > > > When you re-connect to your server and find that the > display appears > > to be black, do the mouse and keyboard still work in spite > of that? > > Do you get any errors logged from WinVNC4 in the > Application Event Log > > > on the server? > > > > Have you seen this problem with any other systems? > > > > Which operating system is the server running? > > > > Regards, > > > > Wez @ RealVNC Ltd. > > > > > > > -----Original Message----- > > > From: Boland Pat-A19945 [mailto:[EMAIL PROTECTED] > > > Sent: 26 August 2005 22:17 > > > To: James Weatherall; vnc-list@realvnc.com > > > Subject: RE: Blank Screen Problem > > > > > > James: > > > > > > Well, the VNC Server is running as a system service on the > > computer I > > > am trying to access remotely so in the service mode. > (But I don't > > > think it make much difference I turn it on and leave it running). > > > Now on the viewer side initially everything is fine, I > can see the > > > remote server screen, and this will work indefinitely. > But when I > > > shut the viewer session down, lets say after 10 min. when I > > bring the > > > viewer session up again it connects but all I get is a > > black or blank > > > screen, the connection is present but the view of the > > remote server is > > > > > not present. > > > > > > To get a non-blank screen session on the viewer, I must have > > someone > > > at the remote PC shut down the VNC Server (service) and > > restart it. > > > Then on the viewer side I get both the connection and the remote > > > machine display visible on the viewer. > > > > > > I hope this helps clarify the problem. If not maybe you have a > > > specific question. > > > > > > Regards - Pat > > > > > > > > > I'm afraid I can't really understand the description of > the problem > > > > > that you provide here. You refer to resetting the > > > system, but then > > > > > describe shutting down a User-Mode VNC Server and > > > restarting it, as > > > > > far as I can tell. Which do you actually mean? Are > you really > > > > > running VNC Server in User-Mode, or in Service-Mode? I > > > also don't > > > > > understand "After that time period however, all you get > > > is a blank > > > > > screen, if you shut down the local PC and try to > > > establish another > > > > > session, until you reset the remote server end again. " > > > at all - if > > > > > you've shut down the PC then it is off and will not > respond to > > > > > connection attempts at all. > > > > > > > > > > > -----Original Message----- > > > From: James Weatherall [mailto:[EMAIL PROTECTED] > > > Sent: Friday, August 26, 2005 10:49 AM > > > To: Boland Pat-A19945; vnc-list@realvnc.com > > > Subject: RE: Blank Screen Problem > > > > > > Pat, > > > > > > Sorry, I was hoping you would re-state the problem using > > the standard > > > terminology, since I'm afraid I was still a little confused > > as to what > > > > > you were describing! > > > > > > The port used for RFB traffic is normally port 5900 under Windows. > > > > > > Packet size is a fundamental characteristic of the > > underlying network > > > and has nothing to do with VNC (unless it's incorrectly > > configured at > > > one or other end, in which case it can cause network > > applications such > > > > > as VNC to stop working). > > > > > > Regards, > > > > > > Wez @ RealVNC Ltd. > > > > > > > > > > -----Original Message----- > > > > From: Boland Pat-A19945 [mailto:[EMAIL PROTECTED] > > > > Sent: 26 August 2005 16:30 > > > > To: James Weatherall; vnc-list@realvnc.com > > > > Subject: RE: Blank Screen Problem > > > > > > > > James: > > > > Thank you. > > > > > > > > To my other question: can you tell me What firewall > > > configuration > > > > ports need to be open, and what packet size should be > used? What > > > > settings on the client side interact with firewall if any. > > > Is there a > > > > timer on ports for firewall? > > > > > > > > Regard - Pat > > > > > > > > -----Original Message----- > > > > From: James Weatherall [mailto:[EMAIL PROTECTED] > > > > Sent: Friday, August 26, 2005 10:24 AM > > > > To: Boland Pat-A19945; vnc-list@realvnc.com > > > > Subject: RE: Blank Screen Problem > > > > > > > > Pat, > > > > > > > > The relevant terminology is: > > > > > > > > User-Mode means VNC Server running as a normal > application on the > > > > computer you are trying to access remotely. > > > > Service-Mode means VNC-Server running as a system > service on the > > > > computer you are trying to access remotely. > > > > > > > > The VNC viewer is simply called VNC Viewer, and runs on > > the viewing > > > > computer. > > > > > > > > Regards, > > > > > > > > Wez @ RealVNC Ltd. > > > > > > > > > > > > > -----Original Message----- > > > > > From: Boland Pat-A19945 [mailto:[EMAIL PROTECTED] > > > > > Sent: 26 August 2005 16:09 > > > > > To: James Weatherall; vnc-list@realvnc.com > > > > > Subject: RE: Blank Screen Problem > > > > > > > > > > James: > > > > > > > > > > Thanks so much for the reply. Sorry, resetting the system > > > did mean > > > > > shutting down the VNC server side from a user account and > > > > restarting > > > > > it. Not to confuse the situation I am actually running both > > > > the server > > > > > > > > > and client (from time to time) but it is the user-mode > > > > (client?) I am > > > > > > > > > having the problem with. > > > > > > > > > > At the remote PC (VNC server side) VNC is shut down, then > > > restarted. > > > > > Either manually by someone in that location or via the > > > service-mode > > > > > (which always works). Once it is back up again there is > > no blank > > > > > screen problem (user mode) on the local side until the user > > > > closes the > > > > > > > > > session via the firewall . Then if they try to > > > reestablish a proper > > > > > connection occurs but a blank screen ensues via the firewall. > > > > > Connecting directly > > > > > without the firewall the connection establishes perfectly > > > > every time. > > > > > > > > > > Let me go off in a different direction: What firewall > > > configuration > > > > > ports need to be open, and what packet size should be > > used? What > > > > > settings on the client side interact with firewall if any. > > > > Is there a > > > > > timer on ports for firewall? > > > > > > > > > > Regards - Pat > > > > > > > > > > -----Original Message----- > > > > > From: James Weatherall [mailto:[EMAIL PROTECTED] > > > > > Sent: Friday, August 26, 2005 5:53 AM > > > > > To: Boland Pat-A19945; vnc-list@realvnc.com > > > > > Subject: RE: Blank Screen Problem > > > > > > > > > > Pat, > > > > > > > > > > I'm afraid I can't really understand the description of > > > the problem > > > > > that you provide here. You refer to resetting the > > > system, but then > > > > > describe shutting down a User-Mode VNC Server and > > > restarting it, as > > > > > far as I can tell. Which do you actually mean? Are > you really > > > > > running VNC Server in User-Mode, or in Service-Mode? I > > > also don't > > > > > understand "After that time period however, all you get > > > is a blank > > > > > screen, if you shut down the local PC and try to > > > establish another > > > > > session, until you reset the remote server end again. " > > > at all - if > > > > > you've shut down the PC then it is off and will not > respond to > > > > > connection attempts at all. > > > > > > > > > > Can you explain further? > > > > > > > > > > Regards, > > > > > > > > > > Wez @ RealVNC Ltd. > > > > > > > > > > > > > > > > -----Original Message----- > > > > > > From: Boland Pat-A19945 [mailto:[EMAIL PROTECTED] > > > > > > Sent: 18 August 2005 18:31 > > > > > > To: Boland Pat-A19945; James Weatherall; > vnc-list@realvnc.com > > > > > > Subject: RE: Blank Screen Problem > > > > > > > > > > > > James: > > > > > > I tried loading different releases of VNC on > > > both the remote > > > > > server > > > > > > side and the local PC, I have shut off fast user > > > > switching nothing > > > > > > helps this blank screen problem. When the system is > > > reset at the > > > > > > remote server side (shut down VNC server application > > > and bring up > > > > > > again) the full screen appears and remains up for as long > > > > > as the local > > > > > > > > > > > server has an established session. If the local session is > > > > > shutdown > > > > > > within 5 maybe 10 minutes of the reset, you will not see > > > > that blank > > > > > > screen. After that time period however, all you get > > is a blank > > > > > > screen, if you shut down the local PC and try to > > > > establish another > > > > > > session, until you reset the remote server end again. > > > > > > > > > > > > Help; Thanks - Pat > > > > > > > > > > > > -----Original Message----- > > > > > > From: Boland Pat-A19945 > > > > > > Sent: Tuesday, August 09, 2005 1:09 PM > > > > > > To: 'James Weatherall'; vnc-list@realvnc.com > > > > > > Subject: RE: True color and extremely slow speed > > > > > > > > > > > > James: > > > > > > I get the frame (boarder) where the remote > > > server is suppose to > > > > > > appear, but instead of the remote PC blue screen and > > > > icons - or any > > > > > > application that would be running, I get "black" which I > > > > call blank > > > > > > inside the viewer window. I hope that answers your question. > > > > > > Regards - Pat > > > > > > > > > > > > -----Original Message----- > > > > > > From: James Weatherall [mailto:[EMAIL PROTECTED] > > > > > > Sent: Tuesday, August 09, 2005 12:12 PM > > > > > > To: Boland Pat-A19945; vnc-list@realvnc.com > > > > > > Subject: RE: True color and extremely slow speed > > > > > > > > > > > > Pat, > > > > > > > > > > > > Can you explain what you mean by "blank screen"? > > > > > > > > > > > > Regards, > > > > > > > > > > > > Wez @ RealVNC Ltd. > > > > > > > > > > > > > > > > > > > -----Original Message----- > > > > > > > From: Boland Pat-A19945 [mailto:[EMAIL PROTECTED] > > > > > > > Sent: 09 August 2005 17:27 > > > > > > > To: James Weatherall; vnc-list@realvnc.com > > > > > > > Subject: RE: True color and extremely slow speed > > > > > > > > > > > > > > James: > > > > > > > Yes, I wondered if that went anywhere. Attached > > > > is the email I > > > > > > > originally sent. I don't know if Fast user switching > > > is on. I > > > > > > > originally thought it was a VNC option, which I > did not see. > > > > > > > I'll look > > > > > > > at it on the server. > > > > > > > > > > > > > > Thanks for responding to me. -Pat > > > > > > > > > > > > > > > > > > > > > > > > > > > > -----Original Message----- > > > > > > > From: James Weatherall [mailto:[EMAIL PROTECTED] > > > > > > > Sent: Tuesday, August 09, 2005 11:14 AM > > > > > > > To: Boland Pat-A19945; vnc-list@realvnc.com > > > > > > > Subject: RE: True color and extremely slow speed > > > > > > > > > > > > > > Pat, > > > > > > > > > > > > > > I'm afraid I can't find any record of you having > asked this > > > > > > question > > > > > > > before, in our archives. > > > > > > > > > > > > > > Can you explain what you mean by "blank screen"? > > > > > > > > > > > > > > Are you using Fast User Switching and/or Remote Desktop > > > > on the XP > > > > > > > machine that is running server? > > > > > > > > > > > > > > Regards, > > > > > > > > > > > > > > Wez @ RealVNC Ltd. > > > > > > > > > > > > > > > > > > > > > > -----Original Message----- > > > > > > > > From: Boland Pat-A19945 [mailto:[EMAIL PROTECTED] > > > > > > > > Sent: 09 August 2005 17:04 > > > > > > > > To: James Weatherall; John Mao; vnc-list@realvnc.com > > > > > > > > Subject: RE: True color and extremely slow speed > > > > > > > > > > > > > > > > James: > > > > > > > > I've asked this question before, but still have > > > > > this lingering > > > > > > > > problem. I am running VNC on and XP server. When I > > > > > bring up the > > > > > > > > viewer on either an XP desktop or Win2000 desktop I > > > > get a blank > > > > > > > > screen. > > > > > > > > The connection goes through, but I just get a blank > > > screen. > > > > > > > > When I shut > > > > > > > > down the VNC server side and bring it up again, it works > > > > > > fine, but > > > > > > > > once I close the session, I can be assured of a blank > > > > > > screen on the > > > > > > > > next desktop connection. I would leave it on > all the time > > > > > > > but other > > > > > > > > desktops have to use it as well. Since the > server is 2000 > > > > > > > miles away > > > > > > > > shutting down and restarting the server side is not a > > > > good work > > > > > > > > around. > > > > > > > > > > > > > > > > Any suggestions? > > > > > > > > > > > > > > > > Thanks - Pat Boland _______________________________________________ VNC-List mailing list VNC-List@realvnc.com To remove yourself from the list visit: http://www.realvnc.com/mailman/listinfo/vnc-list
