IMX6ULL Autorun takes ages to start

Technical Support
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1

So once the unit is turned on i need to start my application automatically.

I have created a service

[Unit]
Description=myapp service, runs the program
After=multi-user.target

[Service]
Type=simple
ExecStart=/home/root/myapp

[Install]
WantedBy=multi-user.target

to run my app and i have done systemctl enable <service_name>.service which worked successfully.

Now when i turn on the module EVENTUALLY it executes

Here are some timings

(Time in seconds from power on)

10 : Kernel starts and splash screen is shown (expected operation)

25 : Screen goes blank - at this point i see

[ OK ] Started Login Service.

[ 14.987911] Bluetooth: BNEP (Ethernet Emulation) ver 1.3

[ 14.994753] Bluetooth: BNEP filters: protocol multicast

[ 15.036494] Bluetooth: BNEP socket layer initialized

[FAILED] Failed to start Load default USB gadget schema g1.schema.

30 : Screen displays a white screen with what looks like the login after (Do i need to disable this somehow in menuconfig ?)

37 : login appears on the console

109 : The application runs

Q. Do i need to get it to auto login ?
Q. Why does it take so long to run

2

Dear @adrian,

For the error, “Failed to start Load default USB gadget schema g1.schema” , there is a fix already in the commuity mentioned. Not sure if it will work for BSP 3, but you can try to check that. Linux gadget on iMX7 - Technical Support - Toradex Community

I have a couple of questions:

  • Does the module vootup to desktop if you don’t enable in the service?
  • What exact reference image is your image based upon?

Furthermore, to benchmark systemd there is systemd-analyze which might be helpful:
https://wiki.archlinux.org/index.php/Improving_performance/Boot_process

Normally,there should not be any issue, so could you please check your service again?

Best Regards,

Janani

3

Hello,

The module boots up to the console (No GUI desktop)

I expect my service is only run once everything has completed installing.

I wonder if there is something i can change in my service to make it start straight away as soon a s login appears

4

Hello @adrian,

How long does it take to boot up to the desktop (without your service)? If the boot -up is faster and as usual, I wonder if it could be something with your app service?

What exact reference image is your image based upon?

Best Regards,
Janani

5

If i login via the terminal the app starts straight away.

Is it waiting for a login timeout to expire ? then starting without any external login ?

6

Hello,
I dont quite understand what you mean by “login via terminal”. Could you please be more specific?

7

login via terminal … i have a serial port connected to the terminal output.

The unit boots up and then ends at

imx6ull login

As soon as i type ROOT the app starts

I now wonder if without typing anything, the login times out and then my program runs

8

So the line in the service i was missing is

Before=getty.target

so the full service looks like this

[Unit]
Description=myapp service, runs the program
After=multi-user.target
Before=getty.target
 
[Service]
Type=simple
ExecStart=/home/root/myapp
 
[Install]
WantedBy=multi-user.target
9

Hello @adrian ,

So, this line added to your application now fixes the issue?

Best Regards,
Janani

10

Yes, as soon as the splash screen clears my service runs immediately and my app starts

11

Hello @adrian ,

That’s perfect! Thank you for your reply