linuxcnc-2.8.0-pi4.img - no USB on raspberry pi 4 - 8GB & 2GB

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19 Nov 2020 15:41 #189785 by idea
No work around that i have seen yet, i've not had time to see how a manual install works.

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28 Nov 2020 20:44 #190548 by idea
So i downloaded [2020-08-20-raspios-buster-armhf.img] and followed the instructions [gnipsel.com/linuxcnc/uspace/rpi4-rt.html] to install PREEMPT RT, no issues in compiling and installing, at reboot i got the errors

xhci_hcd 0000:01:00.0: can't setup: -110
xhci_hcd 0000:01:00.0: init 0000:01:00.0 fail, -110

And the machine fails to boot any further, intermittetent green flashing light. So looks like an issue with the RT kernel. This is likely because using external USB SSD.

I also tried the pre-made iso [unofficialpi.org/Distros/RealtimePi/nightly/] which gave a whole load of other errors and failed to boot any further.

Submitted bug report [github.com/raspberrypi/linux/issues/3976]
Attachments:

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28 Nov 2020 21:01 #190551 by idea
Looks like recognised issue, may be being worked on. [github.com/raspberrypi/linux/issues/3713]

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09 Jan 2021 17:13 #194622 by zz912
I wanted to ask, what is the conclusion of this thread for beginners?
Will it ever be possible to use "sudo apt-get update" for RPI 4?

Is this the end for the current LinuxCNC + RPI 4?

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10 Jan 2021 23:17 #194805 by andypugh
I made a new kernel image for the newer Pi4. The kernel on the LinuxCNC repository is now that fixed kernel.

It nearly works for the Pi400 too (except no Wifi on the Pi400)

Folllow the instructions here to get a working LinuxCNC on top of a stock Buster install:
linuxcnc.org/docs/2.8/html/getting-start...lling_on_raspbian_10

That process works, I did it myself half an hour ago as part of my testing.

I am working on a new SD card image, but so far have only managed to make a version with no USB on _anything_ so that isn't ready yet.
The following user(s) said Thank You: Mike_Eitel, tommylight, zack

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11 Jan 2021 16:50 #194923 by tjtr33
I tried to find a 'stock Buster install' and only found Raspberry PI OS images.
The only image that mentions Buster is for a PC or MAC.
www.raspberrypi.org/documentation/instal...ing-images/README.md

I used an image i had earlier saved 2020-05-27-raspios-buster-full-armhf.img.

What's the name of the image you used and where is it to be found?

I used the image I had and followed the instructions at
linuxcnc.org/docs/2.8/html/getting-start...lling_on_raspbian_10

but had the 'no mouse no keyboard' symptom
when i arrived at
"""
install the realtime kernel
sudo apt-get install linux-image-4.19.71-rt24-v7l+
7) Install linuxcnc (a reboot may be required prior to installing)
"""
I pre-emptively rebooted before step 7, tho I was not prompted to reboot.
After the desktop reappeared I had no mouse or keyboard ( numlock led fails )

Did I go wrong with the buster image and/or was the reboot the mistake?
thx
TomP

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11 Jan 2021 17:46 #194929 by alkabal
Hi think for the moment do not doing upgrad allow to have somehting working
if you do
sudo apt-get upgrade
this will break the usb.

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11 Jan 2021 19:39 - 11 Jan 2021 19:40 #194940 by andypugh

What's the name of the image you used and where is it to be found?


I used whatever the Raspberry Pi Imager uses:
www.raspberrypi.org/software/

I think that you might need a fairly new image to have USB with the newer devices.
Did you have USB after the original install?

I don't have an 8GB Pi. I do have a Pi400. The Pi400 has no USB with the old realtime kernel but does have USB with the new realtime kernel.

It is possible that you need a new Pi starting install to have the required firmware available to the new realtime kernel.
Last edit: 11 Jan 2021 19:40 by andypugh.

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11 Jan 2021 19:45 #194941 by andypugh
What does "sudo rpi-eeprom-update" say?

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11 Jan 2021 19:58 #194945 by andypugh
I have an idea.

After installing the realtime kernel, but before reooting:

sudo apt-get install rpi-eeprom

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