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Month: June 2020

Re: [trinity-users] Re: Re: ARM build

From: "Dr. Nikolaus Klepp" <office@...>
Date: Sun, 21 Jun 2020 11:36:44 +0200
Anno domini 2020 Sun, 21 Jun 04:39:42 -0400
 Gene Heskett scripsit:
> On Sunday 21 June 2020 04:11:05 deloptes wrote:
> > Gene Heskett wrote:
> > > Which version of tde?
> >
> > The PB and the DEV (14.1) on raspbian and debian
> >
> > > I rather like its ability to manage multiple workspaces, and my
> > > current gui on the rpi4, LXDE, does a poor job of that, not
> > > remembering a hard to configure 4 pane setup over a reboot, its
> > > easier to ssh -Y into it several times when building LinuxCNC .deb's
> > > from scratch. �From other machines with more comfortable seating. I
> > > use R14.0.8 on two machines here, but not on the rpi4. It is a hair
> > > hard on latency's though, a point where the pi's can use all the
> > > help they can get since there is not a port of RTAI to the armhf's.
> >
> > I don't have CNC and can't comment. The kernel is an issue as the
> > debian kernel did not work (buster) - I am not sure if it now works
> > though.
> >
> The debian version of u-boot is not compatible with the pi's boot loader 
> for armhf.  Never has been to my knowledge.
> The one time I tried the netinstall, which installs grub and an arm64 
> kernel, it booted nicely but networking was broken.
> Basicly if you want debian on a pi you must use the raspbian flavor, it 
> Just Works, with the usual putzing with networking of course if running 
> a host file based network which I am.

Hi Gene!

Just this week I tried to get arm64 of devuan running on a RPi3B. While almost everything worked and it booted really fast (~ 5 sec. from powerup to userland) I was not quite satisfied. To be more precise, the official 5.XX kernel did not boot, the official hardware support for the vidocore is broken etc., so I think arm64 not working is not a devuan/debian issue but also present upstream. The BSDs work on the PI4, too, but with the same problems. The armhf/lf work like a charm. Now I'm running the same version of devuan armlf for RPI1 on all of my RPIs, that means only keeping one image up to date. Looks like RPI is entering the same problematic field like C64 vs. C128 :)

Oh, the last RTAI patch I saw was for kernel 3.XX, I think, and nothing since then. Worked fine. RT-PREEMPT is pestilence on my systems (not only RPi)


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> Cheers, Gene Heskett

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