[K12OSN] LTSP and VNC

[cliebow]

i use x11vnc to view stu\dent ltsp desktops...and am testing its
incorporation into Teach2.py...Set up local apps...run x11vnc -display
:0 on client...then use vnc from server to connect.i have some of it
written up...chuck.

On Tue, 2004-08-24 at 13:55, Richardson John Paul MSgt 373 TRS Det 5/CSS
wrote:
> Hello all,
>  
> I'm against a brick wall here.  I have searched Google and the archive
> for this mailing list until my eyes have become crossed.  I have the
> following LTSP problem that I am hoping someone can help me with.
>  
> I have K12LTSP 4.1 up and running; 1 server and 3 workstations.  All
> workstations are coming up nicely and users can log in to GNOME
> desktops fine.  VNC is another story.  The environment I am trying to
> create is one in which the instructor can take over a students
> desktop when necessary using VNC.  Everything I have tried to get this
> working has resulted in failure.
>  
> VNC works when using the standard vncserver/vncviewer utils.  I start
> vncserver on one workstation then go to another and start vncviewer
> and am presented with the standard Twm desktop.
>  
> Next I tried using x0rfbserver.  When I start x0rfbserver on the
> server, it runs fine; no errors.  I can then connect from a
> workstation to the server using vncviewer and see/use the desktop on
> the server.  When I reverse this procedure (start x0rfbserver on a
> workstation and try to connect from the server or another workstation)
> the RFB window appears but as soon as I try to connect with vncviewer,
> x0rfbserver dies with the following error:
> X Error of failed request: BadAccess (attempt tpo access private
> resource denied)
> Major opcode of failed request: 144 (MIT-SHM)
> Minor opcode of failed request: 1 (X_ShmAttach)
> Serial number of failed request: 571
> Current serial number in output stream: 582
>  
> Google gave me a few returns on this but not being an X programmer, it
> was foriegn to me.  One result also said to try using x11vnc which I
> did.  This had the exact same results.
>  
> Next came use of x0vncserver.  No matter where I try to start (using
> -log *:stdout:100) this I get the following:
> main: XTest extgension present - version 2.2
> VNCServerST: creating single-threaded server x0vncserver
> VNCServerST: shutting down server x0vncserver
> main: unable to bind listening socket: Address already in use (98)
> ~ImageCleanup called
>  
> This same error occurs when I try to run x0vncserver on the server but
> with the addition of one line:
> ~Image called - usingShm 1
>  
> I run x0vncserver with -rfbport 5800 and it seems to start fine (main:
> :Listening on port 5800) but any connection attempts from other
> workstations (using vncviewer 192.168.0.254:#) are refused with the
> following error:
>  
> vncviewer: ConnectToTcpAddr: connect: Connection refused
> Unable to connect to VNC server
>  
> So that is where I am.  I help that can get me moving again is most
> appreciated.
>  
> J Paul Richardson
>  
> 
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