RE: Focus deadlock --solved

["Specht, Eliot D." <spechted@ornl.gov>]

Thanks for your help. The developer of Winteracter determined that the EPICS system is behaving normally. I was seeing problems because the Winteracter code was generating an inappropriate call to XSetInputFocus.

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

________________________________
From: tech-talk-bounces@aps.anl.gov [tech-talk-bounces@aps.anl.gov] on behalf of Specht, Eliot D. [spechted@ornl.gov]
Sent: Thursday, October 23, 2014 1:15 PM
To: tech-talk@aps.anl.gov
Subject: Focus deadlock

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