TBH after the Rock64 / Pro64 and other RK3399 boards I think the Pi4 came around 6 months too late, A76 / Axx are just around the corne, the dual hdmi ( micro/mini ? ) is a total waste.
Nige On Mon, Feb 3, 2020 at 1:50 PM Gene Heskett <ghesk...@shentel.net> wrote: > > On Monday 03 February 2020 11:34:41 Nigel Sollars wrote: > > > Perhaps you could leverage this from raspian, > > I have no "leveerage" with raspbian. They officially have zero support > for a realtime kernel. 4 posts to their forum in threads related, over4 > days have not elicited a reply from anyone. > > I have no problems building kernels on the rpi4b as I two SSD'd mounted > on sata-usb3 cables, so a full kernel bulld is under an hour in wall > time. I also, because its only a 2G pi, have a 10G swap partition > mounted, and the swapfile turned off to reduce pressure on the u-sd > card. > > > https://lb.raspberrypi.org/forums/viewtopic.php?t=245908 > > > > I dont have any experience with this one nor have hardware ( not a pi > > fan ). More Pi4 SoC info came in with 5.4/5 anyhow so you would want > > something recent to get it done. > > The pi-4b is a whole new critter worth looking at. > > Nige > > > > On Mon, Feb 3, 2020 at 11:00 AM Lennart Sorensen > > > > <lsore...@csclub.uwaterloo.ca> wrote: > > > On Mon, Feb 03, 2020 at 10:41:17AM -0500, Gene Heskett wrote: > > > > Written to a 64GB card with dd, makes zero attempt to boot on > > > > rp4b. > > > > > > > > Put presently running raspbian buster 10.2 card back in, boots up > > > > normal. > > > > > > > > Suggestions? > > > > > > According to https://wiki.debian.org/RaspberryPi there is no support > > > for the Pi4 in Debian's kernel yet (after all it has to be supported > > > upstream before Debian will support it). > It is supported upstream by any linux-rt kernel newer than 4.14 although > 4.14's support for the mali gfx isn't quite fully baked until 4.19.y. > > I am actually running a > > Linux rpi4.coyote.den 4.19.71-rt24-v7l+ #1 SMP PREEMPT RT Thu Oct 10 > 15:22:22 EDT 2019 armv7l GNU/Linux > > right now, but a /boot/dts/overlays directory has apparently been removed > from newer ones, and I'm trying to find a workaround, or make an arm64 > boot work and rebuild LinuxCNC to run on a 64 bit build. I'd settle for > either scenario. > > > > Raspbian has no issues > > > with using a patched kernel with stuff that isn't supported upstream > > > yet as long as it makes Pi models work with it. > > > > > > Also the boot process for the 4 is completely different than the > > > older models as far as I know. > > So it would appear Len. And I'll repeat, the original 10.0 netinstall > Just Worked, and felt dead stable, but now a 10.2 of this buster doesn't > even try to boot. The main diff is that there is now a pair of ssd's on > sata adaptors plugged into the usb-3 ports with a total of 360G > available as scratchpad workspaces. > > > > > > -- > > > Len Sorensen > > Thanks Len, for any enlightement. > > 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> -- “Science is a differential equation. Religion is a boundary condition.” Alan Turing
