Config Auto-Updater Not Working / Crazy Jitter Numbers?

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6 years 5 months ago #168200 by ajklotz

PCW wrote: In general you are not likely to see very good Preemt-RT latency numbers on low power CPUs like the D2500.

Is there some reason not to use the old Wheezy RTAI image?


The original reason I switched to this was my newborn knowledge in all of this was based around the Ubuntu 10.04 we had been using. By the time I fought through any form of updating/fresh-installing anything newer than that, I finally did end up trying that Wheezy iso.

I got caught up in some of the differences trying to now be using Debian. It was missing bits and pieces I was used to having and I couldn't get the repositories working to get any of it.. Mainly that I couldn't get our network drive mounted and couldn't get samba.

Then I found that an ubuntu/mint version was floating around, which instantly had me back and feeling comfortable with getting things set up. Ended up switching that to XFCE because it was running like garbage and I had seen how well XFCE went while I was trying Ubuntu 18 along the way.

Then I finally got to the latency test and found out how off the mark I was.

If it would be easier/required to just get used to whatever I need to do with Debian/wheezy and go back to getting RTAI going, I can do that.. I was originally tasked with 'update everything' and it seemed like wheezy was already running out of support, but if just using that iso is the best shot I've got, I'll give it another go.

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6 years 5 months ago #168203 by PCW
There is a buster/RTAI image floating around, that may be worth a try
Maybe someone with more direct current RTAI experience can chime in here

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6 years 5 months ago #168230 by tommylight
There were two Mint ISO's with RTAI, one made by me, but i can not find it !
It can be used as live version to test but installing it to HDD had some issues and failed. The other one was removed.
Fount it
forum.linuxcnc.org/9-installing-linuxcnc...-rtai-and-preempt-rt

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6 years 5 months ago #168286 by ajklotz

tommylight wrote: There were two Mint ISO's with RTAI, one made by me, but i can not find it !
It can be used as live version to test but installing it to HDD had some issues and failed. The other one was removed.
Fount it
forum.linuxcnc.org/9-installing-linuxcnc...-rtai-and-preempt-rt


Firstly, thank you for the time and reply and info.

Then, I'm not trying to be a pain, but this is all so new and confusing so:

I see that should be an ISO with RTAI, but I'm concerned about the "boot from usb" only. We have 12+ mills we are looking to run this on and I'm not sure Boot from USB is going to be an acceptable end result for my boss. Looking through the thread, it looked like it was back and forth on whether it could eventually be tweaked enough to get it to install.

If the main issue I have right now is the Kernel, can I just swap to the RTAI kernel, or does the entire image need to be built around that? I found this along the way: linuxcnc.org/temp/ but I wouldn't know which one to grab. The RTAI with AMD64 in the name?

Or is it still going to be easier to try to get Wheezy going and deal with learning what I have to learn with Debian and fixing the repositories? With how slow Ubuntu 18.04 and Mint Mate (or cinnamon?) were running, I'm concerned that main distro might not be light enough? Is there an XFCE equivalent?

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6 years 4 days ago - 6 years 1 day ago #187623 by merkurios
That's strange because I've never had this type of issue and I can't say what might be the reason. Doesn’t it depend on what sort of update policy you have defined? Check /var/log/mintupdate.log, and if that is empty or it does not exist, check syslog for the mint update cron job, something that might prevent it from running. You can also try to run it manually to see what happens: sudo /etc/cron.daily/mintupdate. Anyway, you should keep in mind that we all have those days when all the numbers are wrong and everything just slips out of your hand, so be patient. At www.sunsigns.org/angel-number-55-meaning/ you can find all the meanings of the number 55 from an astrological point of view, and the impact that this number can have on your life.
Last edit: 6 years 1 day ago by merkurios.

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