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Date:	Wed, 12 Aug 2015 14:47:08 +0200
From:	Markus Hoenicka <markus DOT hoenicka AT mhoenicka DOT de>
To:	cygwin AT cygwin DOT com
Subject:	Re: X: Authorization required, but no authorization protocol specified
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At 2015-08-12 14:18, Ken Brown was heard to say:
> On 8/12/2015 2:22 AM, Markus Hoenicka wrote:
>> At 2015-08-07 11:26, Jon TURNEY was heard to say:
>>> On 06/08/2015 17:56, Markus Hoenicka wrote:
>>>> I've upgraded my setup yesterday and ran into a problem running the 
>>>> X
>>>> server. X ran just fine before the upgrade, just like any X client I
>>>> threw at it. I'm aware that some defaults have changed in the couple 
>>>> of
>>>> months since I upgraded, and I hope I've done everything the FAQ
>>>> recommends to accommodate these changes. However, no joy.
>>>> 
>>>> Starting the X server now is noticeably slower, regardless of how I
>>>> start it (Windows start menu, startx, or my hitherto preferred 
>>>> method
>>>> startxwin). Biggest problem though is that local X clients cannot
>>>> connect. The server output is like this:
>>>> 
>>>> $ startxwin /usr/bin/xterm
>>>> xauth:  file /home/markus.hoenicka/.Xauthority does not exist
>>>> xauth:  file /home/markus.hoenicka/.Xauthority does not exist
>>>> xauth:  file /home/markus.hoenicka/.Xauthority does not exist
>>>> xauth:  file /home/markus.hoenicka/.Xauthority does not exist
>>> 
>>> startxwin is just a shell script (based on the standard startx), 
>>> which
>>> invokes xauth to add an authorization cookie to ~/Xauthority (which 
>>> is
>>> also passed to the server using the -auth option)
>>> 
>>>> The file ~/.Xauthority is created during startup, and it is empty
>>>> after the server shuts down. It does not make any difference if I
>>>> remove the empty file before restarting the X server.
>>> 
>>> It should have some (binary) content while the server is running, but
>>> that seems to be failing to happen, for some reason.
>>> 
>>>> As a workaround I can start XWin manually like this:
>>>> /usr/bin/XWin :0 -multiwindow
>>> 
>>> This works, of course, because this doesn't use -auth.
>>> 
>>>> However, I suppose the default behaviour of startx and startxwin was 
>>>> not
>>>> intended to perform like this. Did I miss something obvious?
>>> 
>>> Indeed.
>>> 
>>> Is there anything unusual about your home directory?
>>> 
>>> You might try modifying startxwin to remove the -q from xauth -q to
>>> see if that reveals a bit more information.
>> 
>> I finally got round to run this suggested test too. The first time I 
>> try
>> to start X I get the following output:
>> 
>> $ XAUTHORITY="" startxwin /usr/bin/emacs
>> Using authority file /home/<username>/.serverauth.1076
>> Writing authority file /home/<username>/.serverauth.1076
>> Using authority file /home/<username>/.Xauthority
>> Writing authority file /home/<username>/.Xauthority
>> xauth:  file /home/<username>/.Xauthority does not exist
>> xauth:  file /home/<username>/.Xauthority does not exist
>> Using authority file /home/<username>/.Xauthority
>> Writing authority file /home/<username>/.Xauthority
>> 
>> Welcome to the XWin X Server
>> Vendor: The Cygwin/X Project
>> Release: 1.17.2.0
>> OS: CYGWIN_NT-6.1 SBHC123 2.2.0(0.289/5/3) 2015-08-03 12:51 x86_64
>> OS: Windows 7 Service Pack 1 [Windows NT 6.1 build 7601] (Win64)
>> Package: version 1.17.2-1 built 2015-07-09
>> 
>> XWin was started with the following command line:
>> 
>> /usr/bin/XWin :0 -multiwindow -auth
>>   /home/<username>/.serverauth.1076
>> 
>> [...nothing interesting here...]
>> 
>> cat: /home/<username>/.serverauth.1076: No such file or directory
>> winProcEstablishConnection - winInitClipboard returned.
>> winClipboardThreadProc - DISPLAY=:0.0
>> OS maintains clipboard viewer chain: yes
>> winInitMultiWindowWM - XOpenDisplay () returned and successfully 
>> opened
>> the display.
>> winMultiWindowXMsgProc - XOpenDisplay () returned and successfully
>> opened the display.
>> winClipboardProc - XOpenDisplay () returned and successfully opened 
>> the
>> display.
>> winMultiWindowXMsgProcErrorHandler - ERROR: BadMatch (invalid 
>> parameter
>> attributes)
>> 
>> ** (emacs:2996): WARNING **: Error retrieving accessibility bus 
>> address:
>> org.freedesktop.DBus.Error.Spawn.ChildExited: Process org.a11y.Bus
>> exited with status 1
>> Authorization required, but no authorization protocol specified
>> Unable to init server: Could not connect: Abstract UNIX domain socket
>> addresses not supported on this system
>> 
>> (emacs:2996): Gtk-WARNING **: cannot open display: :0
>> xinit: connection to X server lost
>> 
>> [...normal shutdown sequence...]
>> 
>> Emacs does not manage to open an X window during this process. I tried
>> to spot .server* in a second MinTTY console during startup, but no 
>> such
>> file would show up although xauth claims to have written the
>> .serverauth.XXXX file.
>> 
>> Now if I run exactly the same startxwin command a second time, Emacs
>> *does* start up in an X window, although the startxwin output also
>> claims this:
>> 
>> cat: /home/<username>/.serverauth.2212: No such file or directory
>> 
>> This time, the second MinTTY console confirms the presence of that 
>> file:
>> $ ls -al .server*
>> -rw-rwx---+ 1 <username> <group> 52 Aug 12 08:03 .serverauth.2212
> 
> Could the problem be related to the group permissions, possibly due to
> the ACL on your home directory?  Here's what I see on my system:
> 
> $ ll .serverauth.*
> -rw------- 1 <username> <group> 156 2015-08-10 15:44 .serverauth.5968
> 

I don't think so. If I use my workaround, the permissions are all the 
same:

$ ls -al ~/.serverauth.4564
-rw-rwx---+ 1 <username> <group> 52 Aug 12 08:15 
/home/markus.hoenicka/.serverauth.4564

regards,
Markus

-- 
Markus Hoenicka
http://www.mhoenicka.de
AQ score 38


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