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

So, I found that the image for the raspberry pi on linuxcnc.org/downloads/ has an issue with no USB connectivity on the 8GB Pi 4 boards.

The image boot through to the desktop, but USB keyboard and mouse do not function. And because it is a loaded image there is no chance to set it up for wifi and remote connection to enable access.

I made a comment here; forum.linuxcnc.org/9-installing-linuxcnc...4-tutorial?start=140

And someone else noticed the same issue; forum.linuxcnc.org/9-installing-linuxcnc...ial?start=110#179461

But I thought it better to pull out to a separate thread.

So no issues with plain raspbian [2020-08-20-raspios-buster-armhf.img], just linuxcnc image [linuxcnc-2.8.0-pi4.img]

I also get the following errors with linuxcnc that do not come up with raspbian;

kvm [1]: Error, CPU 0 not supportd!
xhci_hcd 0000:01:00.0: can't setup: -110
xhci_hcd 0000:01:00.0: init 0000:01:00.0 fail, -110


Some possibly related links
www.cnx-software.com/2019/11/04/raspberr...ork-on-ubuntu-19-10/
linux.debian.bugs.dist.narkive.com/Uz3Xr...-raspberry-pi-4b-8gb
leo3418.github.io/2020/09/20/raspi4-fedora-usb-simple.html
leo3418.github.io/2020/09/21/raspi4-fedora-usb-complex.html
bugs.launchpad.net/ubuntu/+source/linux-raspi2/+bug/1848790

My first post here, hi all. I ran into the same issue. I followed the instructions at linuxcnc.org/docs/2.8/html/getting-start...etting-linuxcnc.html (7.3. Installing on Raspbian 10) for every Kernel of the 4.19.XX series and always after replacing with the patched realtime Kernel linux-image-4.19.71-rt24-v7l+ after reboot I still could log in via SSH, but anything connected via UBS (in my case the touch function of a touchscreen, and also mouse and keyboard) did not work anymore. I also tried the manual replacement of the Kernel with a precompiled realtime version from gnipsel.com/linuxcnc/uspace/rpi4-rt.html - same problem.

Hi all,

Just ran into the same problem. All fine with a Raspi 4, 4GB. When I move the SD card to the 8GB no keyboard and mouse.

Hi

I did a side by side comparison of a Pi4 with 4GB and 8GB. I modified the image in order to get ssh from the first boot. Both have a mouse connected and no screen.
The dmesg shows that on the 8GB the xHCI could not get activated (see line 142/142. Later this device is mentioned as the USB Host controller.



This problem appears only with the linuxcnc image.

Board version RPi4 4GB:
Hardware : BCM2835
Revision : c03111
Serial : 10000000ed832f24
Model : Raspberry Pi 4 Model B Rev 1.1

Board version RPi4 8GB:
Hardware : BCM2835
Revision : d03114
Serial : 1000000005046c7f
Model : Raspberry Pi 4 Model B Rev 1.4

The same devices booting Raspberry Pi OS / Debian Buster:


BR
Tom

Same issue goes for the Raspberry Pi 4 Model B - 2 GB
No USB after boot

I found the following at - wiki.debian.org/RaspberryPi4

- USB doesn't work up to kernel 5.7 for the hardware variant of PI4 with 8GB RAM
- This issue has a fix in kernel 5.8 (currently in experimental): lkml.org/lkml/2020/5/5/998

But I'm not clear if the build image here is running debian

so no usb period after startup? do they power up at all?

i havent tried it on my 8gb yet, but here is what rpi forum says, seems related to the topic at hand

www.raspberrypi.org/forums/viewtopic.php?t=287340
www.raspberrypi.org/forums/viewtopic.php?t=285563

My 8GB powers up all the way through to the desktop, just fails to start USB during boot (see errors logged above), so no keyboard / mouse.

Hi all,

Having the same issue with my pi4 8GB. No USB after boot.

What's the current workaround? I'm very new to LinuxCNC so this also my first install.

Kind regards,
Brett.