Okay, so after the latest set of updates, this still seems to happen.
Attached is the XWin.0.log file. I am running this in Virtualbox, so it
is possible that this issue has something to do with that?

Hamish

On 07/09/2019 19:50, Hamish McIntyre-Bhatty wrote:
> I was starting with "startxwin &" in the Cygwin terminal. Is this the
> wrong way to do it?
>
> I'll try that soon and get back to you.
>
> This was before the latest set of updates to Xorg and the openGL
> libraries, so it could be that it had something to do with the missing
> libEGL dependency - I will try again now, and hopefully it will work
> :). If it's any help, I'm running Cygwin on Windows 7.
>
> Hamish
>
> On 07/09/2019 16:11, Jon Turney wrote:
>> On 05/09/2019 11:28, Hamish MB wrote:
>>> libraries. Additionally, the xwin server refuses to start if more than
>>> one display is present, for reasons I don't understand.
>>
>> That is unusual.
>>
>> I assume you are trying to start via the start menu shortcut?
>>
>> Does starting it as 'XWin -multiwindow' work?
>>
>> If not, can you provide the /var/log/xwin/XWin.0.log?
>>