Hi Dirk,
We haven't been running MEDM on RHEL so I don't know if it's showing the
same problem for us. I can confirm that the behavior you describe
matches what has been reported to me by operators using EDM on RHEL.
Exposing the window seems to solve the problem.
An X/Motif problem does seem like a possibility. We recently had to turn
off the BIG-REQUESTS extension on the RHEL X servers because it
generated errors for certain other (non-EPICS) applications. Does anyone
know if this might be a problem for EDM? We're using xorg-x11 6.8.2
release 1.EL.19.
--Brian
Dirk Zimoch wrote:
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
--
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
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