-----Original message-----
From: Seth Galitzer <sg...@ksu.edu>
Sent: Tue 10-09-2013 20:12
Subject: [SunRay-Users] Xeyphr/Xnest connection fails
To: SunRay-Users mailing list <sunray-users@filibeto.org>;
> This came up last week, and after much fiddling it finally seemed to
> sort itself out. But it has come up again and I'd like to find out
> what's causing it.
>
> I'm running SRSS 5.3.0.0.49 on Solaris 10 (SunOS 5.10 Generic_147441-27).
>
> I'm running a kiosk app which is a script that generates a login
> selector. One of the login options is an XDMCP connection to a linux
> server, using Xeyphr (I've also tried Xnest and get the same results).
> Xeyphr is launched via a script (adapted from one written by Mac Lee
> from Sun Canada in 2005) that looks like this:
>
> # begin script
> HOST="linuxhost"
> WINDOW_SIZE="1680x1050"
> WINDOW_POS="0+0"
> SCREEN_DIMENSION=`/usr/openwin/bin/xdpyinfo | grep dimension | awk
> '{print $2}'`
> GEOMETRY=$SCREEN_DIMENSION
> HIGHEST_DISP=`netstat -an -P sctp | grep X11 | awk '{print $NF}' | sort
> -nut X -k 3,3 | tail -1 |sed 's/\/tmp\/.X11-unix\/X//'`
> if [ "$HIGHEST_DISP" = "" ]; then
> HIGHEST_DISP="0"
> fi
>
> FREE_DISPLAY=`expr $HIGHEST_DISP + 10`
> echo "High: "$HIGHEST_DISP > $HOME/xephyr.log
> echo "Free: "$FREE_DISPLAY >> $HOME/xephyr.log
> echo "Starting Xephyr session on Display :"$FREE_DISPLAY >> $HOME/xephyr.log
> /usr/X11/bin/Xephyr :$FREE_DISPLAY -pn -fullscreen -host-cursor
> -extension GLX -once -query $HOST >> $HOME/xephyr.log 2>&1
> # end script
>
> The complicated part in the middle there is used to determine the next
> available display so that there are no clashes with clients.
>
> When I went around with this last week, I tried cold restarting the DTU
> I was testing with, tried a cold restart of the sunray service, and
> finally tried a cold restart of the server itself. None of these
> resolved the problem. I was pulled away for something else for about 30
> minutes, and when I came back to continue testing, it was suddenly
> working again.
>
> Here are the contents of the logfile from a failed session:
>
> High: 43
> Free: 53
> Starting Xephyr session on Display :53
>
> Xephyr unable to use SHM XImages
> _XSERVTransNAMEDOpenPipe: Can't open /tmp/.X11-pipe/X53
> _XSERVTransOpen: transport open failed for named/hostname:53
> _XSERVTransMakeAllCOTSServerListeners: failed to open listener for named
> Error in setting egid to 0: Not ownerError in setting egid to 0: Not
> ownerError in setting egid to 0: Not owner
> Fatal server error:
> XDMCP fatal error: Session failed Failed to connect to display :53
>
> I should note that even when the connection is successful, the logfile
> still contains the lines warning about not being able to set the egid or
> open the .X11-pipe file.
>
> Anybody tell me why the XDMCP session fails or where else I can look to
> find an answer? Is there a limit on the available number of displays?
> Is there a better way to find a free display to run the session on? Is
> something else completely unrelated to displays and pipes going on here?
>
> Thanks.
> Seth
>
> --
> Seth Galitzer
> Systems Coordinator
> Computing and Information Sciences
> Kansas State University
> http://www.cis.ksu.edu/~sgsax
> sg...@ksu.edu
> 785-532-7790
> _______________________________________________
> SunRay-Users mailing list
> SunRay-Users@filibeto.org
> http://www.filibeto.org/mailman/listinfo/sunray-users
>
Hi Seth,
did you try to set the setuid bit of the xephyr binary? I tested a similar
setup with an OpenIndiana SunRay server recently and experienced an alike
problem. After setting the setuid bit of /usr/bin/Xephyr everything worked
flawlessly.
According to the docs this shouldn't be necessary for Xephyr, but I didn't had
the time to find out why it doesn't work as expected, so far.
I use a script that allows to choose from a list of different servers inspired
by a script of Craig Bender, which as well has a part for sorting out the next
available display. You may find my version at http://pastebin.com/TdiGnR2B.
cu
Carsten
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