RPI5 RealDash CAN working, but 'Connecting ... can0' pop ups

General Bugs and troubleshooting
1

New setup appears to be mostly working.
RD is sending can messages OK (not tested rx yet)
However, ‘Connecting … can0’ message keeps popping up every 7s or so.
Is there another issue I should check - how to stop behavior?
Are there any Linux logs that can be checked to ensure RD is happy?

Background:
RPI5, Copperhill CAN hat

Linux 6.6.74+rpt-rpi-2712 #1 SMP PREEMPT Debian 1:6.6.74-1+rpt1 (2025-01-27) aarch64 GNU/Linux

dmesg;
[ 2.050276] mcp251x spi0.0 can0: MCP2515 successfully initialized.
[ 7.133831] can: controller area network core
[ 7.137668] can: raw protocol

realdash-mrd_2.4.7-1_arm64.deb
Started from GUI graphics menu
Cmd line fails rudely!;
$ which realdash
/usr/bin/realdash
$ realdash --v
15:01:42.545 os_linux.cpp(444)(tid:0xd5fb5d3d) : NUTS_INFO - --v
Segmentation fault

I would like to have RD start automatically from a startup script

2

Did some quick tests and on my Ubuntu development setup I’m unable to reproduce this. You are saying that it launches properly from Graphics menu, but not from terminal?

3

Apologies - the segfault only occurs when try to start realdash from a ssh session. When started from a shell in the gui (as one would normally do of course), it starts with no issues.

But my OP primary issue remains - even though CAN messages seem to be working ok, keep getting the pop up on the RD screen every 7s or so

4

For starting from SSH session, you need to set env variable for the screen.

DISPLAY=:0 realdash

It could also be DISPLAY=:1, or something else depending on your Linux configuration.

5

thanks for the display tip.
Any thoughts on why keep getting the ‘Connecting … can0’ pop up even when can traffic is working?

6

Are there any logs that can help me troubleshoot the ‘Connecting … can0’ pop up issue? I am seeing RD send CAN messages with no apparent issue. At this time no CAN messages are coming in but that should not be a factor?

7

Very difficult to troubleshoot remotely. I believe Linux SocketCAN connection is working properly as many RD users are using it actively. Maybe a wrong CAN baud setting or something. Have you verified with terminal and candump that you are actually getting the frames?

8

Since you seem like the most skill one on here I have a question I want to design a specific dash to use for my prototype car but I am not use to this software and even looking for people to hire to do so I was unable to find any would you be interested in’s collab or working with my company to develop a specific dash for us and of course the community is welcome to use it. We would componsate for your time and effort please email me @deluxluxurymotorsports@gmail.com

9

FYI, in looking to provide fresh data, resetting the system - am now not seeing the pop up messages anymore.

Were these a result of receiving errors from the API (socketCAN?)?

It would be helpful to know in case these pop up again, even on an apparently working system, or if there is a log file that can be checked.

10

Hello DLM1, I would like to help you but am more-than full time working on a project deadline for April 15th. After that may have some time available.

11

okay that works ive been reading the tutorial and learned enough to make a basic dash only thing left to do is adding different mode rn as it sit my map sit directly in the middle of my dash but i trying to figure out how to change whats being displayed in the middle instead of always displaying the map i want to be able to go from music to speed then to map or nothing but will wait till you have free time. if i can help you in any way please let me know (also ive uploaded my dash to the community feel free to check it out.

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