> Some of the computers with on-board video handle certain things > in BIOS ROM routines, and these can cause upsets to the RT > environment on some machines. Sometimes you can turn these > things off, or set them to be done by Linux-level software > rather than "hidden" features, by turning down the X-windows > acceleration support in the configuration menu. I can easily > see how a screensaver could trigger some bit-blt activity that > might have side effects. I think this one is well worth pursuing.
Well I tried a lot of these things in the past few days (disabling Ethernet in the BIOS, "NoAccel" for X, etc. etc.) but nothing worked. I've now selected another machine to run the mill and it shows around 10 us jitter with the latency-test. I might do a few more tests with the problematic machine, but don't hold your breath for the solution. Would be interesting to hear if anyone else comes up with this 155ms every 10min. I made a wiki page with results from my two machines here: http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Latency-Test would be nice to see what numbers other people get. There seems to be a preference for 'vintage' hardware (P3/P4 or similar), I wonder how much better at RT these are than current hardware? Anders ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
