Hello,
Please find attached the script /etc/postinstall/xlaunch.sh and the 
output of its execution (file postinstall_xlaunch.txt).
Thank you.
Best regards,
Jean-Paul Bouchet

On 02/06/2016 15:21, Jon Turney wrote:
> On 31/05/2016 17:36, Jean-Paul Bouchet wrote:
>> I try to install cygwin 64 on a windows 7 PC in order to let users open
>> an X11 session via xlaunch  on a linux server (gdm3).
>>
>> I have selected only 3 components of X11 to complete the default
>> selection : xinit, xlaunch and Xorg server.
>>
>> The installer seems to freeze when it executes 
>> /etc/postinstall/xlaunch.sh.
>> Information about the progression of the installation is blocked during
>> several minutes with 99% Cygwin - Setup
>>
>> If I don't cancel the installation, it seems to finish correctly.
>>
>> 17:36:33   running: C:\cygwin64\bin\bash.exe --norc --noprofile
>> "/etc/postinstall/xlaunch.sh"
>> 17:55:47   Changing gid to Administrators
>>                  Ending cygwin install
>>
>> Is it a normal behaviour ?
>
> Thanks for reporting this problem.
>
> No, this is not normal or expected.
>
> Perhaps you could manually run the postinstall script with 'sh -x 
> /etc/postinstall/xlaunch.sh.done' to see where it is getting stuck?
>