Re: EDM screens not updating on Linux

[Brian Bevins <bevins@jlab.org>]

Hi Zen,

That sounds more like a channel access configuration problem. Is your 
IOC correctly set up to send server beacons to the machine where you're 
running EDM? See:

http://www.aps.anl.gov/epics/base/R3-14/9-docs/CAref.html#Configurin2

--Brian

Szalata, Zenon M. wrote:
> I have seen a similar behaviour in EDM.  The most recent was: EDM was
> running and was displaying correctly data from an IOC.  I restarted
> the IOC, the EDM displays went white, as they should, but never
> showed that the EDM reconnected untill I placed it in edit then
> immediately in execute mode.  It was not the IOC because for a few
> minutes I was monitoring one of the PV's with a caget; the IOC was
> publishing its data on the CA long before (minutes) I made EDM
> recover.  I am using edm version 1-11-0zb running on RHEL4. Zen
>
> -----Original Message----- 
> From: tech-talk-bounces@aps.anl.gov
> [mailto:tech-talk-bounces@aps.anl.gov] On Behalf Of Dirk Zimoch 
> Sent: Thursday, November 08, 2007 1:05 AM 
> To: Brian Bevins Cc: EPICS
> Techtalk Subject: Re: EDM screens not updating on Linux
>
> Hi Brian,
>
> we have seen the same effect with MEDM. I suspect a problem with
> either the X-server or the motif library. It is very strange that the
> effect appears only on some computers.
>
> It seems that the screens don't get update requests when new values
> arrive. Minimizing and maximizing, or just "wiping" the screen with
> some other window generates the update events and the current value
> is shown. From this I conclude that there is no problem in EPICS and
> the monitor events correctly arrive. The values are just not updated
> on the screen. Can you verify this with EDM?
>
> Dirk
>
> Brian Bevins wrote:
> > We are in the process of converting our control room machines from
> >  HP-UX 11.11 to RedHat Enterprise Linux (rhel) 4WS. Most things
> > seem to be working fine, but an odd problem has cropped up with EDM
> > that we did not have on HP-UX.
> >
> > Every now and then an EDM display will simply stop showing any
> > updates to the PV's. Closing and re-opening the display gets it
> > working again. Writes from the screen to the ioc's seem to work
> > normally.
> >
> > Has anybody else experienced a problem like this?
> >
> > We are using EDM 1-10-2 on rhel 4WS (Nahant Update 5). This is the
> >  same version we have bee using on HP-UX with no problems.
> >
> > Our operators love how zippy EDM runs on their new Linux boxes 
> > compared to the ancient HP hardware, but this is really denting
> > their enthusiasm.
> >
> > Thanks, --Brian
>
> -- Dr. Dirk Zimoch Paul Scherrer Institut, WBGB/006 5232 Villigen
> PSI, Switzerland Phone +41 56 310 5182


--
Brian S. Bevins, PE
Computer Scientist / Mechanical Engineer
Thomas Jefferson National Accelerator Facility

     "Progress, far from consisting in change,
      depends on retentiveness. Those who cannot
      remember the past are condemned to repeat it."
                                         -- George Santayana