X11 errors

[lokke]

i am running a PPC G5 xserve (10.4.8), which is acting as a cluster head node for 7 cluster nodes. the primary purpose of this server is to run an analysis environment called matlab. it is hosting shared data (AFP/NFS/SMB) which is stored on an Xraid (connected by fibre through a qlogic switch.)

when i try connect to the server via SSH (with the -Y option) and try to run matlab i get the following error:

 kCGErrorRangeCheck : Window Server communications from outside of session allowed for root and console user only
INIT_Processeses(), could not establish the default connection to the WindowServer.Abort

if i do the same as root, it works, but obviously i can’t be giving out root access to the users.

as a test i tried to run xlogo, and got the following error:

X11 connection rejected because of wrong authentication.
X connection to localhost:15.0 broken (explicit kill or server shutdown).

this also works when i am root.

also, when i first log in, after i enter my password, i get the folllowing error:

Warning: No xauth data; using fake authentication data for X11 forwarding.

which i have seen elsewhere referred to as a warning i can safely ignore

but then after the message of the day i get the following error:

/usr/X11R6/bin/xauth:  error in locking authority file /homes/lhighstein/.Xauthority

does anyone have any idea why this would be the case? better yet, anyone know how i can solve this?

[lokke]

additional info:

if i use remote desktop to log into the server, log in as admin, launch X11, and in the xterm window type xlogo, it works fine.

if i su to my user acct, and try the same thing i get the following error:

Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified

Error: Can't open display:  :0

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