Android Studio: /dev/kvm device permission denied

问题:

When I try to run my Android app on an emulator I get this error:

/dev/kvm permission denied.

I checked the permissions and added the user I am currently logged in with to the kvm group. What is wrong?

回答1:

As mentioned in the comments, starting with Ubuntu 18.04 and Linux Mint Tara you need to first sudo apt install qemu-kvm.

To check the ownership of /dev/kvm use

ls -al /dev/kvm

The user was root, the group kvm. To check which users are in the kvm group, use

grep kvm /etc/group

This returned

kvm:x:some_number:

on my system: as there is nothing rightwards of the final :, there are no users in the kvm group.

To add the user yourname to the kvm group, you could use

sudo adduser yourname kvm

which adds the user to the group, and check once again with grep kvm /etc/group.

As mentioned by @Knossos, you might want to log out and back in (or restart), for the permissions to take effect.

---

To open a terminal, see https://askubuntu.com/questions/183775/how-do-i-open-a-terminal#183777.

To find out your username, see https://askubuntu.com/questions/333718/how-can-i-find-out-my-user-name#333832.

回答2:

This is how I got it to work in Ubuntu 18.04

sudo apt install qemu-kvm

Add your user to kvm group using:

sudo adduser <Replace with username> kvm

If still showing permission denied:

sudo chown <Replace with username> /dev/kvm

Try it.

回答3:

Have you also tried following, it should work:

sudo chown <username> /dev/kvm
sudo chmod o+x /dev/kvm

回答4:

Try this, it worked for me:

1. sudo apt install qemu-kvm

2. sudo chown -R <username>:<username> /dev/kvm –

回答5:

This is because /dev/kvm is not accessible. To make is accessible from android studio run the below command

sudo chmod 777 -R /dev/kvm

It will ask for your password. After that restart Android Studio.

KVM is required to rum emulator. If you have not install it yet then install it

sudo apt install qemu-kvm

回答6:

I got this error after updating my ubuntu to 18.04.1. I just download new system image for emulator or you can say that download new emulator and it is worked for me.

回答7:

Running the below command in Ubuntu 18.04 worked for me sudo chown -R /dev/kvm

回答8:

I was in a similar situation with the same error of permissions on /dev/kvm I had done the necessary installations but not added the user to the kvm group All I had to do was

sudo adduser <Replace with username> kvm

and ofcourse DON'T forget to restart your Ubuntu instance.

回答9:

If you open your ide with sudo. You are not going to have this problem.