Experimental Physics and
Industrial Control System

"Allison, Stephanie" <[email protected]> · Fri, 18 Apr 2008 10:44:06 -0700

Hi John,

There was a Nov 2007 thread on a similar topic:
http://www.aps.anl.gov/epics/tech-talk/2007/msg01376.php

We still use screen here and we still have the problem (I think sys$output is blocked while scrolling?) and I haven't found a workaround.  I'd be interested if anyone knows of a solution.  

At some point, we will look at Ralph Lange's setup:
http://epics.aps.anl.gov/epics/wiki/index.php/How_to_Set_Up_Console_Access_and_Logging_for_VME_and_Soft_IOCs

Stephanie Allison

> -----Original Message-----
> From: [email protected] 
> [mailto:[email protected]] On Behalf Of John Dobbins
> Sent: Friday, April 18, 2008 10:22 AM
> To: EPICS Tech-Talk
> Subject: epics IOC and gun screen and copy/scrollback mode
> 
> Dear All,
> 
> When running an EPICS IOC inside GNU Screen we have noticed 
> that if one 
> enters the copy/scrollback mode an odd thing happens. The IOC 
> continues 
> to serve channels access requests but the data acquisition itself 
> appears to be suspended.  When someone accidentally leaves a screen 
> session in the copy/scrollback mode we see that the PVs in 
> that IOC are 
> effectively frozen. If you then go to the screen session and exit 
> copy/scrollback mode normal behavior resumes.
> 
> Have others seen this behavior? If so is there a known fix?
> 
> Regards,
> 
> John Dobbins
> Cornell University
> Lab for Elementary Particle Physics
> 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System