Re: Starting apps problem

[Robert Slover]

Greetings,

I've seen issues like this since Solaris 8, using plain old X 
applications under Xvfb.  Try using 'hostname:4.0' instead of ':4.0', 
it sometimes makes a difference.  I've also had to mess around with 
xauth.  There hasn't been much consistency to it -- sometimes the 
problem spontaneously re-appears after a reboot, but that happens so 
rarely (basically, only for major extended power outages) that I've not 
been able to get to the bottom of it.  Also, notice that there are some 
hidden X-related directories created under /tmp when you start your X 
session.  There will be one or two files for each display, IIRC one for 
UDP and one for TCP sessions. I've seen it happen that these are left 
after a reboot, so they don't get re-created, but have their file 
permissions changed so that the non-root user needing to start the Xvfb 
session on that display can't do so.  Our application then has issues 
the first time it tries to start an X client needing to talk to that 
display (which might be a long time after the reboot).

--Robert

On Nov 5, 2005, at 4:58 AM, Andreas Höschler wrote:

> Hi,
>
> > I haven't used solaris in years, so I can only guess what may be the
> > root of this problem. From what I can tell by the source code I would
> > start looking at the different settings of DISPLAY for the different
> > users. I would expect these to be different. This does not explain why
> > the different, but probably sensible values, make such a big 
> > difference
> > for GNUstep.
>
> We checked that already. The values reach from :0.0 to :4:0, obviously 
> depending on the number of session (Sun Ray). I first thaught having 
> multiple session would cause the problem (GNUstep not being able to 
> handle that would be a disaster), but we were able to have two 
> parallel sessions with two different accounts. I also modified the 
> DISPLAY variable for a user that does not work, though I know think 
> that this makes no sense. Solaris seems to set a specific value for 
> each Sun Ray session. Anyway, this didn't solve the problem. We still 
> get
>
> > 2005-11-04 20:53:43.000 ProjectBuilder[8158] NOTE: Only one display 
> > per
> > host fully supported.
> > 2005-11-04 20:53:43.000 ProjectBuilder[8158] NSImage:
> > compositeToPoint:fromRect:operation: failed due to ImageCache: Cannot
> > lock focus on nil rep
>
> for many (also for newly created) users. Any more ideas what to look 
> for? We will dig into the gui code some more on monday, but if anybody 
> has a clue...
>
> Thanks,
>
>   Andreas
>
>
>
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