** Changed in: linux-raspi (Ubuntu)
Status: Confirmed => Deferred
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Title:
MCP251xFD Driver Failure on Ubuntu with CAN Interface
To manage
This looks to be RT related. I don't think I can make much progress
without access to the HW and a reproducer.
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Title:
MCP251xFD Driver Failure o
Ah, sorry for the confusion. It's been quite a while since I worked on that
topic. As I mainly work on the PREMMPT_RT kernels, I simply forgot about that
one test with the stock kernel.
You are absolutely right.
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Bugs, whi
Sydney, I'm trying to isolate the problem and take RT out of the picture
first.
I'm confused by your statement:
> To be serious I never really looked on non RT patched releases on Ubuntu
> 24.04.
The bug description states:
> Kernel 6.8.0-1020-raspi:
> [130.086150] mcp251xfd spi0.0 can0: IRQ han
Let me recap the situation with the new information:
I verified the MCP2518FD using manually applied RT patches on Kernel 6.6
(Debian) and Kernel 6.12 (Debian), with PREEMPT_RT enabled in the build
configuration. While using Ubuntu, I relied on the Preempt RT kernels
provided by the Ubuntu Pro sub
Hi Jürg,
thanks for looking into that issue.
I tested the new kernel versions.
The versions you specified are without RT Kernel Patch. To be serious I never
really looked on non RT patched releases on Ubuntu 24.04.
Running with Kernel "6.8.0-1028-raspi #32-Ubuntu SMP PREEMPT_DYNAMIC" the
des
Sydney, sorry for the late reply. Can you please test linux-raspi
6.8.0-1028.32 in noble-updates and post the kernel log? I don't expect
this to behave any better but wanted to confirm that the problem still
exists in the latest version.
Afterwards please test this [1], which is 6.8.0-1028.32 plus
** Attachment added: "ubuntu25.04_config.txt"
https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/2109529/+attachment/5876031/+files/ubuntu25.04_config.txt
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Hi Jürg,
thanks for supporting here.
1. For Kernel 6.6 and 6.12 I'm referring to the Raspberry PI OS included ones
aka https://github.com/raspberrypi/linux.
I also tested it on a Ubuntu 25.04 Server image with Kernel 6.14 facing also no
issues. It seems that this bug is kernel 6.8 related only
> This error is not present on Kernel 6.6 and 6.12 and later.
1. Are you referring to the Raspberry Pi OS 6.6 and 6.12 kernels or the
upstream kernel.org kernels?
2. Can you please post the content of /boot/firmware/config.txt from the
(broken) Ubuntu system?
3. Can you please post the content o
Sure. Find it attached here.
** Attachment added: "dmesg.txt"
https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/2109529/+attachment/5875012/+files/dmesg.txt
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The most important log is missing, the output of `dmesg'.
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Title:
MCP251xFD Driver Failure on Ubuntu with CAN Interface
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Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: linux-raspi (Ubuntu)
Status: New => Confirmed
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Title:
Hi all
let me clarify this bug a little bit more. I just verified it again on a clean
Ubuntu 24.04 Server image with Kernel 6.8.0-2019-raspi-realtime received via
Ubuntu Pro Subscription.
There is also some RT optimization done on that system:
/boot/firmware/cmdline.txt:
console=serial0,115200
ProblemType: Bug
AlsaVersion: Advanced Linux Sound Architecture Driver Version
k6.8.0-2019-raspi-realtime.
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
ApportVersion: 2.28.1-0ubuntu3.5
Architecture: arm64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
Au
This bug is missing log files that will aid in diagnosing the problem.
From a terminal window please run:
apport-collect 2109529
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Title:
MCP251x
** Description changed:
Hi there,
One of our customer is using MCP251xFD driver (SPI to CAN converter) for
their solutions based on RPi. Although simple socket communication
works, the customer tries to run Codesys as part of their solution and
while Codesys tries to access CAN interf
** Tags added: kern-13110
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Title:
MCP251xFD Driver Failure on Ubuntu with CAN Interface
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