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<== Date ==> <== Thread ==>

Subject: RE: Focus deadlock
From: Mark Rivers <rivers@cars.uchicago.edu>
To: "Jennings, Guy" <jennings@aps.anl.gov>, "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
Date: Fri, 24 Oct 2014 16:46:51 +0000
Hi Eliot,

If you stop medm from processing events by putting it in edit mode does the problem immediately stop?

If you kill medm and run another EPICS Motif CA application (probe, stripTool, etc.) do you have the problem?

Mark

________________________________________
From: tech-talk-bounces@aps.anl.gov [tech-talk-bounces@aps.anl.gov] on behalf of Jennings, Guy [jennings@aps.anl.gov]
Sent: Friday, October 24, 2014 11:10 AM
To: tech-talk@aps.anl.gov
Subject: Re: Focus deadlock

Doesn’t the common factor seem to be motif?

> On Oct 24, 2014, at 9:50 AM, Specht, Eliot D. <spechted@ornl.gov> wrote:
>
> Pete,
>
> Can you help me to make a well-posed question for the Winteracter developer? What kind of events are created by the EPICS system which could be picked up by an application which is not EPICS-aware? That is, how would you describe a CA monitor event to a developer who is unfamiliar with EPICS?
>
> Eliot Specht
>
> Subject:               Re: Focus deadlock
> From:    Pete Jemian <jemian@anl.gov>
> To:          <tech-talk@aps.anl.gov>
> Date:     Fri, 24 Oct 2014 07:50:49 -0500
> Can this be a an issue where the GUI is receiving CA monitor events directly and focusing the associated window with each event? If so, can you throttle widget updates in Winteracter to a fixed interval rather than updating the GUI for each CA monitor event received?
>
> On 10/24/2014 7:36 AM, Specht, Eliot D. wrote:
> I’m seeing a conflict between:
>
> “medm pilatusDetector.adl” and a Winteracter program.  Winteracter
> creates GUIs for Fortran programs using Motif. The Winteracter program
> is simply waiting for input while the problem occurs. The result is that
> input focus shifts rapidly between two Winteracter windows. The medm
> windows do not get input focus, so it’s hard to understand how medm
> contributes to the problem.
>
> Subject:               Re: Focus deadlock
>
> From:    Pete Jemian <jemian@anl.gov>
>
> To:          <tech-talk@aps.anl.gov>
>
> Date:     Thu, 23 Oct 2014 13:26:17 -0500
>
> What are the GUI applications involved?
>
> On 10/23/2014 1:15 PM, Specht, Eliot D. wrote:
>
> I’m running an application on a Linux x86_64 machine which opens several
>
> windows for user input and data display. It runs fine unless I have an
>
> EPICS areadetector IOC running in the background, in which case I get a
>
> “focus deadlock”, where focus shifts rapidly between two application
>
> windows and the screen becomes unresponsive to keyboard or mouse input.
>
> The problem occurs under Gnome but not KDE. Running KDE is an effective
>
> fix, but it would be nice to get to the bottom of the problem. Can
>
> anyone suggest what’s going on?
>
> Eliot Specht                        Voice: (865)574-7682
>
> Oak Ridge National Laboratory       FAX:   (865)574-4913
>
> P.O. Box 2008, MS 6064
>
> Oak Ridge, TN 37831-6064
>
> Eliot Specht                        Voice: (865)574-7682
>
> Oak Ridge National Laboratory       FAX:   (865)574-4913
>
> P.O. Box 2008, MS 6064
>
> Oak Ridge, TN 37831-6064
>
>
> --
> ----------------------------------------------------------
> Pete R. Jemian, Ph.D.                <jemian@anl.gov>
> Beam line Controls and Data Acquisition, Group Leader
> Advanced Photon Source,   Argonne National Laboratory
> Argonne, IL  60439                   630 - 252 - 3189
> -----------------------------------------------------------
>    Education is the one thing for which people
>       are willing to pay yet not receive.
> -----------------------------------------------------------
>
> Eliot Specht                        Voice: (865)574-7682
> Oak Ridge National Laboratory       FAX:   (865)574-4913
> P.O. Box 2008, MS 6064
> Oak Ridge, TN 37831-6064
>
>




Replies:
Re: Focus deadlock Pete Jemian
References:
Re: Focus deadlock Specht, Eliot D.
Re: Focus deadlock Jennings, Guy

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