[Discuss] runlevel 5 service cannot connect to display

[wichan at adobe.com (William Chan)]

Thank you Jerry! Will check it out

On 2/1/13 7:43 AM, "Jerry Feldman" <gaf at blu.org> wrote:

>I was just using putty/exceed as an example, there is nothing wrong with
>mocha. I found VNC to be much better. The only issue with VNC is that
>you have to have a vnc server running. One way is to assign VNC display
>numbers to each person who needs it, or to have someone log in, start a
>vncserver that will automatically assign a display #. VNC servers run in
>the context of a user id even when running it as a service. In any case
>both Rich and ted have some good ideas.
>
>On 01/31/2013 05:35 PM, John Abreau wrote:
>> I've always found Exceed to be clumsy and cumbersome. I found a
>> free-as-in-beer 
>> alternative long ago that's much lighter-weight and works well with
>> putty; it's called
>> Mocha-X, and it runs as a service in the system tray on XP, and the
>> equivalent 
>> on Windows 7. 
>>
>> http://www.mochasoft.dk/freeware/x11.htm
>>
>>
>>
>>
>> On Thu, Jan 31, 2013 at 7:10 AM, Jerry Feldman <gaf at blu.org
>> <mailto:gaf at blu.org>> wrote:
>>
>>     On 01/30/2013 07:33 PM, Rich Pieri wrote:
>>     > On Wed, 30 Jan 2013 13:37:08 -0800
>>     > William Chan <wichan at adobe.com <mailto:wichan at adobe.com>> wrote:
>>     >
>>     >> Actually, the service is just a JMS consumer, it doesn't
>>     require UI.
>>     >> When it receive a message, it calls an external application which
>>     >> needs X11. There is actually nothing shows on display.
>>     > It's still not a service. Rather, it may be a Java service but
>>     it isn't
>>     > a system service. It's a bit like... imagine a web server (your
>>JMS
>>     > consumer) that pushes web pages into a browser (the X11 server)
>>and
>>     > won't start if the browser won't let you talk to it or isn't
>>running
>>     > or some such. You can't have system services dependent on
>>non-system
>>     > applications and expect them to work reliably. Or, realistically,
>>at
>>     > all.
>>     >
>>     > Regarding Jerry's workaround, I'd use VNC to create a private X11
>>     > server for the application instead of mucking around with X client
>>     > files and worrying about which process owns what.
>>     >
>>     > I maintain that the best solution is to refactor the JMS
>>     consumer as a
>>     > proper service. Make the X11 client depend on it rather than
>>     have the
>>     > consumer depend on the X11 client. It's backwards the way you've
>>     > implemented it. The two workarounds don't fix that.
>>     >
>>     Agreed. I've found VNC to be very stable at work, much better than
>>     Putty
>>     and Exceed (blech).
>>
>>
>>     --
>>     Jerry Feldman <gaf at blu.org <mailto:gaf at blu.org>>
>>     Boston Linux and Unix
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>>     EB90
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>>
>>
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>>
>>
>> -- 
>> John Abreau / Executive Director, Boston Linux & Unix
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>
>-- 
>Jerry Feldman <gaf at blu.org>
>Boston Linux and Unix
>PGP key id:3BC1EB90
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>