Mr. Wallace,
Are you suggesting building the preemt-rt kernel (3.18.7-rt2 ATM) for
wheeze? or jessie? I have built kernels before but it was over ten years
ago. From what I remember it was not that hard. It would require a very
large amount of reading for me at this point as I have just gotten back into
Linux, specifically for LinuxCNC. Please excuse my ignorance, what exactly
is ATM?
-----Original Message-----
From: Peter C. Wallace
Sent: Thursday, March 5, 2015 1:56 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Debian Jessie kernel
On Thu, 5 Mar 2015, Sebastian Kuzminsky wrote:
>> Date: Thu, 05 Mar 2015 10:41:35 -0700
>> From: Sebastian Kuzminsky <s...@highlab.com>
>> Reply-To: "Enhanced Machine Controller (EMC)"
>> <emc-users@lists.sourceforge.net>
>> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net>
>> Subject: Re: [Emc-users] Debian Jessie kernel
>>
>> On 2/27/15 11:00 PM, Jim Connery wrote:
>> I have installed Jessie on my ASUS x200ma as Wheezy didn't play well with
>> my new toy. I am hoping to install Linuxcnc 2.7 and I was looking around
>> for
>> a RT kernel and I cant seem to find one. Any suggestions? Also how long
>> do
>> you folks think it might be before we see ÿÿofficialÿÿ 2.7 and Jessie? I
>> do
>> realize that my system setup will most likely not be reliable enough to
>> make
>> chips with, but I still have parts to make for my lathe anyway and I was
>> hoping to at least get everything going and turn my servos some. I have a
>> mesa
>> 7i92 and the newer system is looking like it my be the way for me to go.
> Yes, Debian unfortunately does not ship an RT-Preempt kernel like they
> did for Wheezy, and we have not refreshed our RTAI kernel for Jessie yet.
>
> 2.7 is stabilizing, we're still finding bugs in the new trajectory
>planner. We'll release it when the trickle of new bugs dries up more.
>
> I'm not sure when the support for Jessie will come - it depends, as
> you've pointed out, on the availability of a realtime kernel. As far as
> i know, no one is currently working on it, though if someone wanted to
> work on it I'd be happy to assist.
>
> What problems did you have with Wheezy on this machine?
>
>
> --
> Sebastian Kuzminsky
For hm2_eth you need a preemt-rt kernel and while wheezy has a stock
preemt-rt kernel available, The current Preemt-RT kernel has much better
performance than the stock one. I would suggest building the latest
preemt-rt kernel (3.18.7-rt2 ATM)
Building preemt-rt kernels is _much_ easier than RTAI kernels
That said, getting decent latency on a laptop is iffy at best (though
I do have linuxcnc/wheezy/hm2_eth running reliably on an older Dell E6420
laptop)
Peter Wallace
Mesa Electronics
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