Experimental Physics and
Industrial Control System

"Szalata, Zenon M." <[email protected]> · Thu, 8 Nov 2007 08:24:08 -0800

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: [email protected] [mailto:[email protected]] 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

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System