:0 just means to connect using /tmp/.X11-unix/X0 ... did something happen to delete that? I'd expect this behavior if something deleted it.
> On Mar 28, 2015, at 07:39, René J.V. Bertin <[email protected]> wrote: > > On Thursday March 26 2015 15:18:20 Jeremy Huddleston Sequoia wrote: > > Hi, > >> That is quite bizarre. I'm able to run 'DISPLAY=:0.0 /opt/local/bin/xterm' >> without issue. > > A couple of reboots of the VM later, and this issue is back: applications > using the Xt from MacPorts won't connect to an X server on :0 or :0.0. The > error: > xterm: Xt error: Can't open display: :0 > > Note that this is not a "connection refused" error. > > This time I've done some more forensics, and unloaded the new > org.macports.startx and (ooold!) org.x.startx plists from launchctl, just > like I always did with the one from XQuartz. > That in itself didn't make any difference, but it is still the case that all > applications can connect to a 2nd X server at :1 or :1.0, even those using > the Xt from MacPorts. > > Interestingly, everyone can also connect to the server at :0 when I use > DISPLAY=localhost:0 (which should be the same ...) > That at least gives me a workaround fix in my .xinitrc, but I'd love to get > to the bottom of this. > > I've been seeing this message in my system.log after logging in, could it be > related? > /System/Library/CoreServices/Finder.app/Contents/MacOS/Finder[153]: The > address for `localhost' is a loopback address, not allowed! > > I'm not sure what this message means, I think /etc/hosts should have a line > "127.0.0.1 localhost" like it's always had, and I can't recall ever having > seen this message before. > > Thanks, > R.
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