Emc vs modern lcd monitors

gene heskett gheskett at wdtv.com
Tue Aug 16 08:14:13 PDT 2011

On Tuesday, August 16, 2011 10:51:41 AM James Cloos did opine:

> Gene,
> If the display gets in the way of the realtime code, you may want to
> separate the two.
> It may not be in vogue these days, but running X11 over tcp still works.
No it doesn't to some distros, like this pclos.  I can ssh -Y into that 
box, but I cannot run the main gfx applications like emc even though I am 
the same user on both boxes.

Example: (having just logged in so the session is fresh)

gene at shop:~$ emc -l
EMC2 - 2.4.6-76-gf8ea663
Machine configuration directory is '/home/gene/emc2/configs/genes-mill'
Machine configuration file is 'genes-mill.ini'
Starting EMC2...
X Error of failed request:  BadLength (poly request too large or internal 
Xlib length error)
  Major opcode of failed request:  135 (GLX)
  Minor opcode of failed request:  1 (X_GLXRender)
  Serial number of failed request:  2583
  Current serial number in output stream:  2584
Shutting down and cleaning up EMC2...
Cleanup done
EMC terminated with an error.  You can find more information in the log:
as well as in the output of the shell command 'dmesg' and in the terminal

And except for the above msg, no other clues for the failure are given in 
any of those named files.  IIRC I even posted that here before, but quite 
some number of months back up the log, and I don't recall getting a helpful 

> An inexpensive laptop, a small fusion or atom box, a plug box will all
> make reasonable graphics nodes.

I have a lappy, but it also has pclos on it.  IIRC it also reports the same 
problem although TBT I haven't tried it recently.  I am currently trying to 
get a belkin router to function as an AP in the shop.  and have had to 
reset it many times because it disappears.  NDI what I am doing wrong other 
than my local net is not on a 192.168.1 or 192.168.2 address block, another 
security measure.  There is nothing precious on the lappy, so I could put 
10.04 LTS on it I guess, but I want to get rid of the cat5 cable I'm always 
tripping over first.
> If you boot the realtime box into text mode the display shouldn't get in
> the way.  And you can always switch the monitor and keyboard over should
> there be any problems booting.
> -JimC

Cheers, gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Appearances often are deceiving.
		-- Aesop

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