[Xquartz-dev] Autolaunched X11 doesn't work with fast-user-switching

Jeremy Huddleston jeremyhu at berkeley.edu
Sun Dec 16 01:45:58 PST 2007

I think the problem stems from our using the default lock file: / 
tmp/.X0-lock ... I don't see why the  original Leopard would've worked  
for you, so can you please check that out and verify?

I'll try to fix this up as I rework the startup stuff... if you  
haven't already, would you mind filing a bug for it for me, so I don't  


On Dec 15, 2007, at 20:14, Merle Reinhart wrote:

> The original Leopard X11 did not have this problem.  I don't have a  
> Leopard with the version just prior to X11-2.1.1 at this point in  
> time to determine if it was X11-2.1.1 where the problem occurred or  
> not (I can probably get there by the end of the weekend).
> Merle
> On Dec 15, 2007, at 8:38 PM, Merle Reinhart wrote:
>> I've been doing a bit more testing with X11-2.1.1 and find that the  
>> autolaunching stuff doesn't work if one user already has the  
>> Xserver started.  At that point, any other user logging in via fast- 
>> user switching is not able to then use X11 (attempting to set  
>> DISPLAY to :1.0 and manually start X11.app winds up in an infinite  
>> loop with Xquartz still trying to talk to the server at :0.0 which  
>> is owned by the other user).
>> At this point in time, I have not been about to find a workaround  
>> that would allow more than one user to utilize X11.app at the same  
>> time.  Could this be because launchd is explicitly hard-coded to  
>> look at the :0 socket when the socket should increase based upon  
>> the number of logged in users?
>> This is potentially a problem with multi-user systems where X11 may  
>> be needed.
>> Merle
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