Mesa hm2/hm2_7i96s.0: error finishing read

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12 Feb 2023 00:42 #264334 by rodw
I don't think it's so much realteks issue but more Debian's implementation of the RT drivers as they seem to roll multiple drivers from the realtek website into a single driver. By itself installing a Debian version with 6.x as it's default kernel is not the solution until you revert to the kernel.org sources and bypass Debian's patches.

Having hm2 sense a slave without an IP address would reduce support overhead given so many today have no idea about TCP networks.
 

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16 Aug 2023 10:43 #278158 by wusel0464
Hello,
I got the same error message when, searched and landed here.
However, and that's my tip: it could also be an electromagnetic intolerance. The error occurs for me when I switch off my suction (SSR relay), I pull the plug and switch off, nothing happens.

I hope Google has translated this usefully, my English is probably worse.

Greeting Frank

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16 Aug 2023 11:46 #278162 by tommylight

The error occurs for me when I switch off my suction (SSR relay), I pull the plug and switch off, nothing happens.

For you it is the interference causing it, but this topic is related to Linux Kernel issues on 6.x version of it.
This error occurs without switching anything, if using 6.1 kernel and Intel network card.
The solution to this is mentioned several times here and elsewhere.
The solution for you might be just getting the grounding wired properly, or might need a ferrite core wound around the suction motor wires.

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15 Nov 2023 03:42 #285449 by spumco
[Rather than starting a new thread, I'll continue here...]

Starting to commission a new build and I'm getting the error finishing read problem crop up within seconds of starting LCNC and could use some help diagnosing.

PC: HP elitedesk 800 G2 mini
NIC: Intel i219LM
LCNC: 2.9 from ISO on LCNC home page
Kernel: 6.1.0-13 (haven't messed with this)

etc/network/interfaces:
auto lo
iface lo inet loopback
auto eno1
iface eno1 inet static
address 10.10.10.1
hardware-irq-coalesce-rx-usecs 0

Grub:
isolcpus=3 intel_pstate=disable processor.max_cstate=0 idle=poll cpufreq.default_governor=performance i915.enable_dc=0 ahci.mobile_lpm_policy=1 irqaffinity=0 nomodeset quiet

Good latency after fiddling with grub.  Just copied the above from the latency thread, don't really understand the backstage stuff.

 

LCNC terminal output:
Warning: Spoiler!


Ping times
Warning: Spoiler!


Would trying a later kernel (6.3,6.4,etc.) help?  I did see mention elsewhere here that there is a recently fixed bug related to Intel i219LM NICs...but don't know if that's related or when the fix will make it to kernels appropriate for LCNC.

Thx
Attachments:

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15 Nov 2023 03:53 #285451 by PCW
I would suspect BIOS settings most.

Is AMT disabled in the BIOS setup?

Are Hyperthreading, C states > C1, EIST, Turbo modes all disabled?

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15 Nov 2023 03:59 #285453 by spumco

I would suspect BIOS settings most.

Is AMT disabled in the BIOS setup?

Are Hyperthreading, C states > C1, EIST, Turbo modes all disabled?
 


Thanks for chiming in PCW... hoping you'd show up for this one.

AMT disabled
Turbo-boost disabled
Hyperthreading disabled
Multi-processor enabled
All power management options disabled

I don't know what C states or EIST are or where they are in the bios.

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15 Nov 2023 12:45 #285499 by tommylight
Just a stab in the dark, but use another LAN cable.
The following user(s) said Thank You: spumco

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15 Nov 2023 15:12 #285516 by spumco
Thanks Tommy.

Of course I'll swap the cable out when I get home tonight, but wouldn't a dodgy LAN cable also result in errors while pinging the 7i96s?
 

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15 Nov 2023 15:26 - 15 Nov 2023 15:27 #285517 by PCW
For a ping test it's better to do many:

ping -c 5 -i .2 10.10.10.10
(to update arp cache)
then:
sudo chrt 99 ping -i .001 -q 10.10.10.10

(then control C after a minute or so)

I have a 800G1 (a bit older) and it is OK Ethernet wise
but has a I217 rather than I219 MAC

It did seem to get better with more recent kernels (running 6.6-rt12 now)

Another thing to try is pinning the Ethernet IRQ to CPU 3
Last edit: 15 Nov 2023 15:27 by PCW. Reason: typos
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15 Nov 2023 16:11 #285523 by spumco
PCW - will do.

I did see an older post of yours describing pinning the Eth IRQ to a core number, but when I tried to duplicate I got a 'permission denied' error despite using sudo.

When you mentioned 'must use root', I'm guessing that means something other than 'sudo ...' in terminal?

A copy-paste for me to pin the Eth IRQ would be helpful.

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