Re: armhf vs buster problem #2
On Wednesday 03 July 2019 16:07:04 Andreas Jellinghaus wrote:
> No idea. Sorry if I missed a mail with the reasons why stock debian
> wouldn't work?
>
The application needs a realtime kernel as its controlling metal cutting
machinery.
> On my ordroid-hc1 I build an sd card image on my deskop as described
> in the wiki:
> https://wiki.debian.org/InstallingDebianOn/OdroidHC1
>
> And with apt search I can see a realtime kernel is available:
>
> linux-image-rt-armmp/testing 4.19+105 armhf
Maybe for your odroid, but the newest for raspian armhf is 4.19.50.
I bought an odroid for this project around 3 years ago, but bricked it
trying to get linux installed. What the don't tell you is that its a
UEFI board, and the linux installers of the day didn't have a clue what
to do about UEFI. So I've got a C2 that cost me two months to get, that
because those folks are downright dishonest in not telling you that in
their advertising, only in the bios did I discover that it had a TPM
chip in it, which if its disabled in the bios, does not bypass that
crap, bricking it instead and worse, you can't reverse it without
spending another $125 for a jtag programmer. I already had a $100 bill
in it and was not impressed enough to spend any more on it, so I next
bought a pair of pi3b's. Which are running the machine fairly well
except for the video frame rate. You can count the frames per second
but you only need one hand as full screen its only about 2 per second.
Buster supposedly has new, faster drivers, but so far I have yet to get
a realtime kernel and buster to meet on the same u-sd.
> Linux for ARMv7 multiplatform compatible SoCs (meta-package),
> PREEMPT_RT
>
> Maybe that could work for you?
Unforch the armhf .deb of 4.19.50-rt-preempt-v7 I have built was not
built to be installed by a u-boot aware builder.
>
> Good luck with your project.
>
> Andreas
>
> Am Mi., 3. Juli 2019 um 21:15 Uhr schrieb Gene Heskett
> <gheskett@shentel.net
>
> > I just yesterday watched RealtimePi make me an image for arm-v7. It
> > went all the motions of building a 4.4.114-rt-v7 kernel out of a
> > arm-hf buster zip containing a 4.19.50-v7 kernel. So knowing the
> > 4.4.114-tr-preempt kernel would be replaced if I ever got the
> > network to work, I added a /etc/apt/preferences.d/kernel.pref to pin
> > the kernel.
> >
> > But imagine my surprise when I plugged that u-sd into the pi and
> > booted it, one of the first things I note is that the images
> > installed kernel is a 4.19.50-v7, which may be straight from the
> > raspian-buster-zip RealtimePi started with.
> >
> > So, how do I convince CustomPiOS to both build the 4.19.50, with
> > realtime patches applied, and then hand it back to RealtimePi to use
> > building the image? I have done that independently from RealtimePi
> > but no clue how make either of the guysoft utilities to actually use
> > it.
> >
> > Help please, and thank you.
> >
> > Cheers, Gene Heskett
> > --
> > "There are four boxes to be used in defense of liberty:
> > soap, ballot, jury, and ammo. Please use in that order."
> > -Ed Howdershelt (Author)
> > If we desire respect for the law, we must first make the law
> > respectable. - Louis D. Brandeis
> > Genes Web page <http://geneslinuxbox.net:6309/gene>
Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
- Louis D. Brandeis
Genes Web page <http://geneslinuxbox.net:6309/gene>
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