Raspberry Pi 4

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01 Sep 2019 14:36 #143781 by skunkworks
Replied by skunkworks on topic Raspberry Pi 4
My rpi4 came with small heat sinks. That plus a fan seems to keep it in the 40-50c range.

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01 Sep 2019 15:43 #143785 by svanteg
Replied by svanteg on topic Raspberry Pi 4
Perhaps the wrong topic...on the off chance this is RPI4 / 4.19.y-rt related...appreciate any guidance.

I've been getting these:
[xcb] Unknown sequence number while processing queue
[xcb] Most likely this is a multi-threaded client and XInitThreads has not been called
[xcb] Aborting, sorry about that.
python: ../../src/xcb_io.c:263: poll_for_event: Assertion `!xcb_xlib_threads_sequence_lost' failed.
/home/pi/cnc/linuxcnc/scripts/linuxcnc: line 896:  2334 Aborted                 $EMCDISPLAY -ini "$INIFILE" $EMCDISPLAYARGS $EXTRA_ARGS
Shutting down and cleaning up LinuxCNC...

I'm running GMOCCAPY and I am on master (pretty much).

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01 Sep 2019 16:50 #143796 by Gene1934
Replied by Gene1934 on topic Raspberry Pi 4

svanteg wrote: Perhaps the wrong topic...on the off chance this is RPI4 / 4.19.y-rt related...appreciate any guidance.

I've been getting these:

[xcb] Unknown sequence number while processing queue
[xcb] Most likely this is a multi-threaded client and XInitThreads has not been called
[xcb] Aborting, sorry about that.
python: ../../src/xcb_io.c:263: poll_for_event: Assertion `!xcb_xlib_threads_sequence_lost' failed.
/home/pi/cnc/linuxcnc/scripts/linuxcnc: line 896:  2334 Aborted                 $EMCDISPLAY -ini "$INIFILE" $EMCDISPLAYARGS $EXTRA_ARGS
Shutting down and cleaning up LinuxCNC...

I'm running GMOCCAPY and I am on master (pretty much).


I'm more fam with axis, but I have NOT seen such an error. So I've no clue if thats related or not, Its a data point only.

I have a rebuild under way after hand patching the rpspi files with the rp4 patch.. That might make it run on a pi4, but I have got to collect more adapters before I can swap the 3 out. Buster straight from a debian-arm netinstall is arm64, not armhf, so the rpspi code may need more editing yet. Buster from the debian-arm install sure runs nice once you nuked enough net stuff to make a static setup work.

Does anyone know if the RealtimePi guy has a realtime kernel that uses the new broadcom video code on the pi3b's yet. That would certainly be a heck of an improvement as i brings glxgears, pulled out to full screen, up to very close to 30 fps.
Thats about 20x faster than I'm getting on a stretch install on the pi3b. We're getting there.

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)
Genes Web page < geneslinuxbox.net:6309/gene >

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01 Sep 2019 19:14 #143800 by Gene1934
Replied by Gene1934 on topic Raspberry Pi 4
The above patches aren't quite enough. Built on a pi3b running buster, which is arm64, rpspi doesn't recognize its running on a pi3b, so it bails out. Should it still run as normal on arm64 as opposed to armhf?

Thanks.

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)
Genes Web page < geneslinuxbox.net:6309/gene >

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11 Sep 2019 03:04 #144775 by Spacehitchhiker42
Replied by Spacehitchhiker42 on topic Raspberry Pi 4
Got linuxcnc working on my RPI4 working over GPIO. Thanks for the information, guys!
still working on hardware stepping on a FPGA, but just wanted to share my progress so far.
Whenever i'm done this will control a Prolight mill.

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13 Sep 2019 14:05 #145060 by tecno
Replied by tecno on topic Raspberry Pi 4
Can not get Andy´s image to boot. Is there any other img to download?
linuxcnc-pi4.img.zip 2019-07-21 09:34 2.9G
The following user(s) said Thank You: Arpad

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13 Sep 2019 18:04 #145068 by BigJohnT
Replied by BigJohnT on topic Raspberry Pi 4

tecno wrote: Can not get Andy´s image to boot. Is there any other img to download?
linuxcnc-pi4.img.zip 2019-07-21 09:34 2.9G


I just installed it from scratch and wrote this tutorial.

gnipsel.com/linuxcnc/uspace/

JT

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13 Sep 2019 18:40 #145073 by tecno
Replied by tecno on topic Raspberry Pi 4
Started your way, boy does this take time..... phuuu....

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13 Sep 2019 19:16 #145075 by tecno
Replied by tecno on topic Raspberry Pi 4
And then the install comes to a stop

sudo apt install git >>>>>>>>>>>>>>>>>> NO GO

/usr/lib/arm-linux-gnueabihf:
Bus error
dpkg: error processing package libc-bin (--configure):
installed libc-bin package post-installation script subprocess returned error exit status 135
Errors were encountered while processing:
libc-bin
E: Sub-process /usr/bin/dpkg returned an error code (1)

pi@plasma:~ $ git clone --depth=1 github.com/raspberrypi/linux -b rpi-4.19.y-rt
-bash: git: command not found
pi@plasma:~ $

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14 Sep 2019 12:47 #145128 by BigJohnT
Replied by BigJohnT on topic Raspberry Pi 4
I've seen network problems prevent the installation of a package, try installing git again.

JT

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