mesa card 5i25 kernel error

this sound not very good ..... I build 12 machine with these motherboard (3 parallel port).... nothings about rtai error .....

@PCW not understand very well your words .... If set 2Khz servo thread this might solve the problem?

Latency test with weezy is not so good as with ubuntu 10.04 this probably is the problem. the max jtter is almost 2 time than ubuntu 10.04 ..... tomorrow I try to install new iso ubuntu 10.04 and linuxcnc 2.6.10 .... than I make my .ini and .hal by hand .....

What is in the bios setting that can causes this rtai problem?

Not sure whats going on, but I simply cannot duplicate _any_ of your issues here.

Start with Atom D510 (I thought it was a D525 but it was really a D510) with Ubuntu 10.04 / LinuxCNC 2.5.4
upgrade to 2.7.1 using the wiki instructions

Run pncconf and create a 3 axis config for a 5I25/7I77 using internal 5I25 data and 7i77x2 with one 7I77 option
(no issues, I assign PWM outputs on the SS1 (TB5) tab and encoders on the P3 tab)

start linuxcnc and select the just created: my_LinuxCNC_Machine

LinuxCNC starts, no errors

(its running now, I'll leave it on for a few days but I don't expect any problems)

The question is: what is different on your machine?

d2550 processor .... is not d525 or d5210 .... it is similar .... this is the motherboard www.asrock.com/mb/Intel/AD2550B-ITX/index.us.asp

2Gb ram 1333Mhz .... 32Gb sata2 HD no other ... (internal graphic board).

These motherboard use UEFI bios .... I think I can disable it.

..... sorry but you ugrade directly from 2.5 to 2.7? ... I make first an upgrade to 2.6 and than to 2.7 ,,,,,

@PCW first It's right to download ubuntu 10.04 from linuxcnc.org?

1. I upgraded directly from 2.5.4 to 2.7.1
2. I dont recall how I installed the original 10.04 image since its been a few years

ok PCW ..... we found a second difference ..... I make a double update ... you only one step .....

These question is for PCW and CMORLEY too....

A first question your ubuntu is 10.04.4 or 10.04.0?

A second question you have installed linuxcnc-dev too or not?

A third question ... if my iso is new from linuxcnc.org repo .... I must update and upgrade (obviusly not dist-upgrade anly upgrade) the system or not?

Please reply me ..... in these way I can make a SO identical to yours. If your system works fine as you tell in the furtem mine too ...

very tanks
Regards
Giorgio