Re: [ferret_users] ferret graphic window running on remote computer

To: Dongxiao Zhang - NOAA Affiliate <dongxiao.zhang@xxxxxxxx>

Subject: Re: [ferret_users] ferret graphic window running on remote computer

From: Karl Smith - NOAA Affiliate <karl.smith@xxxxxxxx>

Date: Wed, 27 Apr 2016 23:05:05 -0400

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Hi Dongxiao,

There was a change in an upgrade of the X-Windows server on RHEL-6 that caused Ferret windows to stop responding. (A particular XWindows event is no longer being generated.) This bug was mentioned in the release notes for 6.95 and the freeze-up issue was fixed in the latest release. There is also a related issue with resized windows not updating which I cannot remember if it was fixed for the current release or if that fix is in this next release soon to go out. This behaviour is only seen when running and displaying ferret on your local system. So having a remote display does not show the problem (which is why I cannot test 6.96 at this time).

So the solution for the freeze-up is to update to the latest ferret, or to use pyferret which does not have these issues. It does surprise me that when your system was just upgraded from RHEL-5 to RHEL-6 that Ferret was not also updated for RHEL-6 (with the latest version). So do let us know if you are running the latest RHEL-6 version of Ferret and this problem.

Best regards,

Karl

On Wed, Apr 27, 2016 at 4:06 PM, Dongxiao Zhang - NOAA Affiliate <dongxiao.zhang@xxxxxxxx> wrote:

Hi all,

I have been running ferret on a remote Linux computer, Jet, from my desktop. I use "ssh -X -L27414:localhost:27414 Jet" to make the connection. This works fine until my desktop was upgraded from RedHat5 to RedHat6. Now, when a plotting command is issued in ferret on Jet, a frame of the ferret graphic window would pop up and freeze there. No graphic would show, just the frame of the window. On the other hand I have no problem view any figures on Jet from my desktop by "gs figure.ps". This suggests that the X window forwarding is working. Anyone knows what went wrong?

Thanks,

Dongxiao

--
Dongxiao Zhang, Ph.D.
Senior Research Scientist
JISAO/University of Washington
NOAA/PMEL Bldg.3
7600 Sand Point Way NE
Seattle, WA 98115
(206)526-4184

Karl M. Smith, Ph.D.
JISAO Univ. Wash. and PMEL NOAA
"The contents of this message are mine personally and do
not necessarily reflect any position of the Government
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