Mesa hm2/hm2_7i96s.0: error finishing read

Not sure about the other parts, but:

6.7.12-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.7.12-1 (2024-04-24) x86_64 GNU/Linux.

Is not a real time kernel.

( It needs to say "PREEMPT_RT" )
 

The method I mentioned includes instructions on how to install the RT kernel too linuxcnc.org/docs/stable/html/getting-st...nate_install_methods

Mine mesa ethernet card has interrupts on cpu0 how can move it to cpu3 isolated for linuxcnc ?

THere is a topic on the forum that explains but I am not logged in to link you to it. Its probably in this thread anyway.

Almost 3 years later and I still have hm2/hm2_7i96s.0:error finishing read!

Grub quiet isolcpus=11 idle=poll r8168.EEE=0 pcie_aspm=off

john@cave:~$ sudo ethtool -i enp6s0
[sudo] password for john:
driver: r8169
version: 6.1.0-29-rt-amd64
firmware-version: rtl8168e-3_0.0.4 03/27/12
expansion-rom-version:
bus-info: 0000:06:00.0
supports-statistics: yes
supports-test: no
supports-eeprom-access: no
supports-register-dump: yes
supports-priv-flags: no
john@cave:~$ uname -a
Linux cave 6.1.0-29-rt-amd64 #1 SMP PREEMPT_RT Debian 6.1.123-1 (2025-01-02) x86_64 GNU/Linux

The r8168-dkms network driver is installed but ethtool reports the driver as r8169

This package provides the dkms source code for the r8168 kernel modules.
Kernel source or headers are required to compile these modules.

Is the above line from apt my clue?

JT

Mine mesa ethernet card has interrupts on cpu0 how can move it to cpu3 isolated for linuxcnc ?

You can temporarily check if this helps:

 

first

chmod +x pinirq.txt

then 

sudo ./pinirq.txt [ethernet_device_name_]

Where [ethernet_device_name] is the name of the Ethernet device connected to the 7I96S
(probably eth0, eno1 enp0s25 or similar)
 

Is the above line from apt my clue?

The problem that is fixed by the DKMS driver has fairly specific symptoms.

can you run:

sudo chrt 99 ping -i .001 -c 60000 -q 10.10.10.10
 (will run for ~ 1 minute)

and post the stats here

(assuming 10.10.10.10 card address)

dkms builds the drivers from source so you need linux-headers installed for the kernel version you are using. but first you need to
sudo apt purge r8168-dkms

then reboot, then
sudo apt install linux-headers-$(uname -r)
sudo apt install r8168-dkms

I ran sudo apt purge r8168-dkms then rebooted now I have no internet connetion on that pc so I can't install anything via apt...

JT

It happens, sorry I broke it... sometimes you can log in using another kernel on your system and resolve. I just can't remember how but I have been caught a few times...