Problems with USB (Solved)

I started a new thread so I wouldn't keep polluting the  qtdragon - probing issues thread.
Starting LinuxCNC 2.9 using QTDragon_HD results in a lot of these errors at startup.

libusb: error [udev_hotplug_event] ignoring udev action change 

I put my old SSD back in the machine.  This one is running Ubuntu 19.3 and LinuxCNC 2.8.4 with QTDragon.
I don't get any of the undev_hotplug_event errors.  This make me think it is not a hardware issue.

While still running debian bookworm I had exercised all of the USB connection and was still getting the error.
I'm going to load up a ODroid H2+ with 8GB ram and see how that goes.  I have 7i76E that I can use with it but it will take some work to replace the BAT1-J1800 MB and 6i25+7i76 that I have in the machine now.  I'll see if that fares any better.

The symptoms I am seeing are that the ASUS touch screen becomes unresponsive but the mouse/keyboard which are usb wireless remain functional.  And sometimes pressing a button on the screen results in the LinuxCNC exiting.

I knew I shouldn't have trusted my feeble memory. It is Linux Mint 19.3 Tricia
Linux X3CNC 4.9.0-13-rt-amd64 #1 SMP PREEMPT RT Debian 4.9.228-1 (2020-07-05) x86_64 x86_64 x86_64 GNU/Linux

I'll give that a try Tommy
Thanks

I found the USB issue. There was one more connection that I forgot about on a USB extension cord that has a repeater in it. I exercised that connector and the problem is gone.

If you are using linuxcnc, please throw versions of Ubuntu and Linux Mint in the bin.
Yeh I know it won't be something you will not like to do but its for the greater good and a functioning machine.
I had to give up Linux mint  a few years ago for this greater good.
You will just waste a lot of time for no reason.

The kernels they are based on are too old to have acceptible latency and often will  not have drivers for modern hardware.
In many cases the Python version they come with is too old for linuxcnc.
In Ubuntu's case they want you pay for the PREEMPT_RT kernel.

Whereas you can just install the current version of Debian (Version 12 - Bookworm) and type a couple of lines and have a functioning machine with preempt_rt installed.

Type a couple more lines and you can connect Debian 12 to the new Linuxcnc buildbot so you can update at any time byt typing one line. 

Do yourself and the world a favour and revert to Debian Bookworm forthwith,
Please refer to this link instead. linuxcnc.org/docs/2.9/html/getting-start...etting-linuxcnc.html
 

Aciera wrote:

Rod, the title reads "Problems with debian Bookworm" not problems with mint or ubuntu.

But Johnny said he was using Mint...... which in my book will never do,,,

When I first started this thread I was only seeing an issue with bookworm and LCNC 2.9. The Mint and 2.8.4 where fine. But, the issue turned out to be a hardware issue (bad USB) connection that only seem to aggravate Bookworm. As soon as I get 2.9 on Bookworm fully working I'll be switching permanently. I need to get my M6 remap working. After that I think I will be good to commit. I'm also considering upgrading from the BAT1-J1800 + 6i25 + 7i76 to a ODroid H2+ + 7i76E.