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kvm permission denied on Android Studio emulator

When I try to run an AVD, I get this erros:

/dev/kvm device permission denied

Yeah, I know, I don't have the permission to access /dev/kvm, I know that I can "solve" it by changing the /dev/kvm permission to my user, and set my user to kvm group, it is working but when I restart my user session, the /dev/kvm permission return to root user and root group, and I need to set the permission to my group again and again...

How to set this permission and prevent that when I reboot my computer my permission are not changed anymore?

SO: Ubuntu 18.04.01

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felipe.rce Avatar asked Oct 05 '18 20:10

felipe.rce


2 Answers

This command should help you:

sudo setfacl -m u:$USER:rwx /dev/kvm

Using it you will grant to current user rwx permissions to /dev/kvm. Or just replace $USER to any user you need.

As mentioned in setfacl manpages "This utility sets Access Control Lists (ACLs) of files and directories." It's a little bit different from chmod and chown. Using it you can grant required permissions to specific user. It's a bit more powerful tool and much more fine-grained. If you want to dive deeper, read about Access Control Lists. For example, in ubuntu docs: https://help.ubuntu.com/community/FilePermissionsACLs

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Andrei Vinogradov Avatar answered Oct 15 '22 14:10

Andrei Vinogradov


Had same problem, it worked when you restart the program.

sudo chmod 777 -R /dev/kvm

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Jamn Nemn Avatar answered Oct 15 '22 15:10

Jamn Nemn