Simulator is not starting. it is showing in booting state only

Vega Open Beta Bug Reports
1

Hi Amazon,

I have install the latest SDK and current version is 0.20.3719. But after the installation, Simulator is not starting and it is showing only boot process. I have checked all possible solution from documentation and FAQ but still simulator is not starting.

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3

Hi @ABP_Network

We are investigating this issue and will provide an update as soon as we have more information.

In the meantime, please try this:

  1. Stop the virtual device: kepler virtual-device stop
  2. Wait 10 seconds
  3. Start fresh: kepler virtual-device start
  4. Wait 30-60 seconds for boot completion
  5. Verify: kepler device list

This will delete the existing VVD state and create a fresh instance, which often resolves boot issues.

Warm regards,
Ivy

4

Hello there,

The long boot time issue you are experiencing can be caused by multiple factors. In order to better understand the root cause, we would need some additional information about your environment.

As a first step, please try increasing the timeout for the Kepler Virtual Device startup process to allow more time for the virtual device to complete the boot sequence before the process is terminated. You can do this by following the documentation below:

https://developer.amazon.com/docs/kepler-tv/kepler-virtual-device.html#start-the-kepler-virtual-device

kepler device simulator start --timeout 600

If this still fails, it is possible that the virtual device instance was corrupted during creation. In that case, please delete the following directory and try starting the virtual device again:

/Users/<username>/kepler/sdk/<version>/kvd/instances/<random-hash>/

If the problem persists, could you please share the following information with us:

  • The full console output you receive.

  • The virtual_device.err and virtual_device.out files located under the instance folder:

    /Users/<username>/kepler/sdk/<version>/kvd/instances/<random-hash>/

  • Your computer architecture and operating system (for example, Intel vs Apple Silicon, macOS version, or Linux distribution)

This information will help us further investigate the issue.

Best regards,
Eder

5

Hi Edernava

I followed your steps, but the problem still persists. I also removed the SDK and reinstalled it, but the simulator is still not starting. It is stuck on booting. I am sharing the details you asked for.

Drive Link for the virtual_device.err and virtual_device.out file

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6

Hi

I have reinstall the SDK but simulator is not starting . it is showing only in boot state. could you help to resolve it on priority ?

7

Hi,

We’ve been trying to reproduce your issue in a similar environment, but the Virtual Device runs correctly on our side. This suggests that the problem may be environment-specific.

Unfortunately, the stdout and stderr files you shared didn’t provide enough information to identify the root cause. Could you please run the following commands so we can better understand what might be happening on your end? Please share the output of each one.

  1. Start the Virtual Device:
kepler device simulator start --timeout 800
  1. In a separate terminal, run:
vda devices
vda shell systemctl list-jobs
vda shell systemd-analyze
  1. Then extract the logs from inside the Virtual Device:
vda shell journalctl -f > logs.txt

Please press Ctrl + C when you want to stop the log collection.
This will generate a logs.txt file—could you share that file with us?

Thank you!