RPI4 Raspbian 64 bit & LinuxCNC
17 Aug 2021 16:04 #217996
by elovalvo
I preferred to use a complete image (and therefore inevitably large) to avoid having to redo a series of commands that are reported in the first post of the topic and that allow you to change the 64-bit operating system with the Preempt_rt and load the version of LinuxCNC compatible with this.
In any case, the image is ZIP-ped and not RAR-red, so as to be able to use the Raspberry Pi Imager directly without unpacking the archive.
Even for the installation I did not have the problems that you report.
I used a common PC with the Raspberry Pi Imager using a USB 3.0 card reader with an SD card at least class 10.
The procedure in this case takes about 10-15 min.
The power supply, as reported in
www.raspberrypi.org/products/raspberry-p...el-b/specifications/
must provide a power of at least 3 Amps.
Check your power supply.
Replied by elovalvo on topic RPI4 Raspbian 64 bit & LinuxCNC
Dear cakeslob,Trying to test out the new image elovalvo, your work is appreciated, but just a few comments
For some reason, every image I download from you (this is the 4th so far), it says the image is corrupted when I unpack the rar files. Ive even redownloaded and it still says corrupted but images appear to load fine.
Unpacked, this image is 8gb so it takes a long time to load it to sd card, I think it took me like 3-4 hours or something.
Lastly, what power supply/setup are you using? When I load the 2.9pre_rt64a on my setup it is incredibly power hungry. it boots the os, but trying to do anything causes huge latency spikes related to not enough voltage. I can assume the improved latency is related to the power draw, but ive only been able to successfully run these images on a CM4 with 12v power supply. this newest one with even latency improved even more(2.9pre_rt64b), I cannot fully boot to os on 2 of my setups so far(normal RPI4). I will try a few more later today, and report back.
That being said, I have had unwavering success with the 32bit 5.4 images you posted some time ago, and have it loaded on several of my setups without issue. Thank you for your work.
I preferred to use a complete image (and therefore inevitably large) to avoid having to redo a series of commands that are reported in the first post of the topic and that allow you to change the 64-bit operating system with the Preempt_rt and load the version of LinuxCNC compatible with this.
In any case, the image is ZIP-ped and not RAR-red, so as to be able to use the Raspberry Pi Imager directly without unpacking the archive.
Even for the installation I did not have the problems that you report.
I used a common PC with the Raspberry Pi Imager using a USB 3.0 card reader with an SD card at least class 10.
The procedure in this case takes about 10-15 min.
The power supply, as reported in
www.raspberrypi.org/products/raspberry-p...el-b/specifications/
must provide a power of at least 3 Amps.
Check your power supply.
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19 Aug 2021 00:38 #218101
by cakeslob
Replied by cakeslob on topic RPI4 Raspbian 64 bit & LinuxCNC
My power supplies are alright, its just a noticeable difference from 32bit images so I was curious , but it appears Ive been wasting a lot of time unziping these images, thank you
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31 Aug 2021 07:21 #219226
by jnp1968
Replied by jnp1968 on topic RPI4 Raspbian 64 bit & LinuxCNC
Hi All
I have "succesfully" installed the image that Elovalvo mentioned above on a RPI4B-8G unit, but my values are not very good, not to say terrible.
Trying to speed up the boot process, I installed the system on the SD card, and then moved it to a 128GB SSD M.2 disk, running it from there.
Running "top" from command line - I'm barely getting below 2.50 and have seen numbers of 4.60.
Latency tests don't go below 100000ns - But i have seen values above 250000!
That said, latency is not my biggest concern, since I am going to use a 7i76e to control my mill,- but even then - numbers as big as 250000 - would that even work ?
I haven't connected the mesa board yet, since my dell 2418HT touch monitor is also bugging me. It's a very fine monitor, but I have a 1/2 inch black frame all way around the desktop, and I can't auto adjust the monitor, no to talk about thew flickering i sometimes get on the lower 1/4 part of the screen (but that's only when I use the attached mouse - which will be disconnected once touch is fully working).
According to this link - Dell 2814HT with Raspberry Pi 4 - the 2418HT should be working with RPI4, but maybe it's the LinuxCNC distro that needs tweaking..?
Also still working on getting the touch screen calibrated to actually point where I touch.
My biggest concern at the moment is the performance of the system though.
Aside testing different IsolCPUs settings, what else could i tweak on to get better performance ?
Any input is highly valued!
Thanks in advance
I have "succesfully" installed the image that Elovalvo mentioned above on a RPI4B-8G unit, but my values are not very good, not to say terrible.
Trying to speed up the boot process, I installed the system on the SD card, and then moved it to a 128GB SSD M.2 disk, running it from there.
Running "top" from command line - I'm barely getting below 2.50 and have seen numbers of 4.60.
Latency tests don't go below 100000ns - But i have seen values above 250000!
That said, latency is not my biggest concern, since I am going to use a 7i76e to control my mill,- but even then - numbers as big as 250000 - would that even work ?
I haven't connected the mesa board yet, since my dell 2418HT touch monitor is also bugging me. It's a very fine monitor, but I have a 1/2 inch black frame all way around the desktop, and I can't auto adjust the monitor, no to talk about thew flickering i sometimes get on the lower 1/4 part of the screen (but that's only when I use the attached mouse - which will be disconnected once touch is fully working).
According to this link - Dell 2814HT with Raspberry Pi 4 - the 2418HT should be working with RPI4, but maybe it's the LinuxCNC distro that needs tweaking..?
Also still working on getting the touch screen calibrated to actually point where I touch.
My biggest concern at the moment is the performance of the system though.
Aside testing different IsolCPUs settings, what else could i tweak on to get better performance ?
Any input is highly valued!
Thanks in advance
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02 Sep 2021 00:13 #219377
by andypugh
Replied by andypugh on topic RPI4 Raspbian 64 bit & LinuxCNC
250,000 is getting a bit marginal, but 100,000 is workable.Latency tests don't go below 100000ns - But i have seen values above 250000!
That said, latency is not my biggest concern, since I am going to use a 7i76e to control my mill,- but even then - numbers as big as 250000 - would that even work ?
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02 Sep 2021 02:30 #219389
by Aaroncnc
Replied by Aaroncnc on topic RPI4 Raspbian 64 bit & LinuxCNC
I was able to lower my latency a good bit by disabling Bluetooth and wifi. And if you need more turn off audio.
My latency also got a bit better after giving it an overclock.
My latency also got a bit better after giving it an overclock.
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02 Sep 2021 05:53 #219403
by jnp1968
Replied by jnp1968 on topic RPI4 Raspbian 64 bit & LinuxCNC
Disabling wifi and bluetooth really helped.
I am now getting numbers steady at 105000,- with 7 x glxgears running.
Starting youtube pushed it straight to 250000, but hen again - I won't be running youtube on this machine when its done. It pure CNC.
Without glxgears and youtube, I'm steady below 80000 - which should be fine accoring to Andypugh's comment
Enabling overclock actually just made it a lot worse - so i'm sticking with the above.
Thanks for the help
Also found a thread about the black border. It suggested that disabling overscan could solve it.
Gonna check that out later today.
I am now getting numbers steady at 105000,- with 7 x glxgears running.
Starting youtube pushed it straight to 250000, but hen again - I won't be running youtube on this machine when its done. It pure CNC.
Without glxgears and youtube, I'm steady below 80000 - which should be fine accoring to Andypugh's comment
Enabling overclock actually just made it a lot worse - so i'm sticking with the above.
Thanks for the help
Also found a thread about the black border. It suggested that disabling overscan could solve it.
Gonna check that out later today.
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02 Sep 2021 13:24 #219433
by Aaroncnc
Replied by Aaroncnc on topic RPI4 Raspbian 64 bit & LinuxCNC
interesting that the overclock made it much worse.
did you not only increase the clock but also voltage and gpu clock?
Also the RPi4 runs hot stock so a small 1" heatsink plus fan helps a ton.
did you not only increase the clock but also voltage and gpu clock?
Also the RPi4 runs hot stock so a small 1" heatsink plus fan helps a ton.
The following user(s) said Thank You: seuchato
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06 Sep 2021 16:46 #219771
by mwinterm
Replied by mwinterm on topic RPI4 Raspbian 64 bit & LinuxCNC
Hello,
I have successfully built the 5.10 RT kernel as well as compiled linuxcnc on a RPi with 64bit Raspbian. Axis GUI is working as well. However when I try to start Gmoccapy I get the following error:
This looks to me like the python-gtksourceview2 module is missing. So I tried to install it with
This fails with the following message:
But on the the 32bit version of Raspbian the package is available.
Is the problem really linked to this missing package. If so, how can I solve this?
Best regards,
Marc
I have successfully built the 5.10 RT kernel as well as compiled linuxcnc on a RPi with 64bit Raspbian. Axis GUI is working as well. However when I try to start Gmoccapy I get the following error:
import gtksourceview2 as gtksourceview
ImportError: No module named gtksourceview2
Shutting down and cleaning up LinuxCNC...
This looks to me like the python-gtksourceview2 module is missing. So I tried to install it with
sudo apt install python-gtksourceview2
This fails with the following message:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package python-gtksourceview2 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'python-gtksourceview2' has no installation candidate
But on the the 32bit version of Raspbian the package is available.
Is the problem really linked to this missing package. If so, how can I solve this?
Best regards,
Marc
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06 Sep 2021 19:49 - 06 Sep 2021 19:57 #219783
by elovalvo
Replied by elovalvo on topic RPI4 Raspbian 64 bit & LinuxCNC
As mentioned in the first post of this thread,
forum.linuxcnc.org/9-installing-linuxcnc...uxcnc?start=0#178299
you can solve the problem like this:
cd ~/
wget ftp.it.debian.org/debian/pool/main/p/pyg...2_2.10.1-3_arm64.deb
sudo dpkg -i python-gtksourceview2_2.10.1-3_arm64.deb
sudo apt --fix-broken install
forum.linuxcnc.org/9-installing-linuxcnc...uxcnc?start=0#178299
you can solve the problem like this:
cd ~/
wget ftp.it.debian.org/debian/pool/main/p/pyg...2_2.10.1-3_arm64.deb
sudo dpkg -i python-gtksourceview2_2.10.1-3_arm64.deb
sudo apt --fix-broken install
Last edit: 06 Sep 2021 19:57 by elovalvo.
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06 Sep 2021 20:00 #219785
by mwinterm
Replied by mwinterm on topic RPI4 Raspbian 64 bit & LinuxCNC
Thanks a lot! Missed that one...
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