# Troubleshoot

Source: [https://docs.qualcomm.com/doc/80-70014-41/topic/troubleshoot.html](https://docs.qualcomm.com/doc/80-70014-41/topic/troubleshoot.html)

This information provides troubleshooting steps for common technical issues.

## Network failures in the Ubuntu VM

Source: [https://docs.qualcomm.com/doc/80-70014-41/topic/troubleshoot.html](https://docs.qualcomm.com/doc/80-70014-41/topic/troubleshoot.html)

Occasionally, network failures may occur in the Ubuntu VM while the host machine has no
            network issues. Any ongoing compilation in the Ubuntu VM may result in the Fetcher
            Failure error.

To re-establish the network in the Ubuntu VM, do the following:

1. To find the corresponding network interface, run the `ip link`
                command in the command terminal.
    The command terminal returns a network interface.
                    For example, enp0s1.
2. Use the network interface to run the following commands and re-establish the network
                in the Ubuntu
                    VM:

        ip link set dev <network_interface> downCopy to clipboard

        ip link set dev <network_interface> upCopy to clipboard

    For
                    example:

    `ip link set dev enp0s1 down`

    `ip
                        link set dev enp0s1 up`

## Slow or unresponsive host machine

Source: [https://docs.qualcomm.com/doc/80-70014-41/topic/troubleshoot.html](https://docs.qualcomm.com/doc/80-70014-41/topic/troubleshoot.html)

If the host machine is slow or unresponsive, the VM may be consuming all the available
            resources of the host machine.

To troubleshoot this issue, do one of the following:
- Use the recommended settings to reconfigure the memory and CPU core allocation
                    for the Ubuntu VM. For instructions, see the following:
    - For the Windows 11 host machine, see Step 3 in [Create an Ubuntu VM in VirtualBox](https://docs.qualcomm.com/doc/80-70014-41/topic/set-up-an-ubuntu-vm-on-windows-11.html#create-an-ubuntu-vm-in-virtualbox__li_ujx_242_5bc).
    - For the Mac host machine, see Step 5 in the following:
        - [Create a VM in UTM on an x86_64-based Mac](https://docs.qualcomm.com/doc/80-70014-41/topic/set-up-an-ubuntu-vm-on-an-intel-based-x86-64-mac.html#create-a-vm-in-utm__li_frn_s42_5bc)
        - [Create a VM in UTM on an Arm64-based Mac](https://docs.qualcomm.com/doc/80-70014-41/topic/set-up-an-ubuntu-vm-on-an-arm64-based-mac.html#create-a-vm-in-utm-on-an-arm64-based-mac)

.
- Reconfigure the Ubuntu VM settings such that the host machine resources are used
                    optimally by the Ubuntu VM and the host machine. For example, distribute the
                    memory and CPU cores equally among the host machine and the VM.
    In addition,
                        avoid running CPU-intensive tasks on the host machine when you are using the
                        Ubuntu VM.

Last Published: Jul 11, 2024

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