blocks|key|2665027|text|正如评论中提到的，从Ubuntu18.04和Linux+Mint+Tara开始，你需要首先使用sudo+apt+install+qemu-kvm。|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|CODE|entityRanges|data|2665028|要检查/dev/kvm的所有权，请使用|2665029|ls+-al+/dev/kvm|code-block|syntax|javascript|2665030|用户是kvm组root。要检查哪些用户在kvm组中，请使用|2665031|grep+kvm+/etc/group|2665032|这将返回|2665033|kvm:x:some_number:|2665034|在我的系统上:由于最终:的右侧没有任何内容，因此kvm组中没有用户。|2665035|要将您的用户添加到kvm组中，您可以使用|2665036|sudo+adduser+$USER+kvm|2665037|这会将用户添加到组中，并再次使用grep+kvm+/etc/group进行检查。|2665038|正如@marcolz所提到的，命令newgrp+kvm应该为您实时更改组成员身份。如果这不起作用，@Knossos提到，您可能希望注销并重新登录(或重新启动)，以使权限生效。或者以@nmirceac+mentioned用户身份通过su+-+$USER在同一个shell中重新登录。|2665039|entityMap|0|LINK|mutability|MUTABLE|url|https://linux.die.net/man/1/newgrp|1|https://stackoverflow.com/questions/37300811/android-studio-dev-kvm-device-permission-denied/45749003?noredirect=1#comment107714346_45749003^0|A|B|M|F|1B|P|0|3|8|0|0|3|3|7|4|K|3|0|0|0|0|B|1|O|3|0|0|0|G|J|0|H|A|37|A|H|A|0|2I|J|1|0^^$0|@$1|2|3|4|5|6|7|1F|8|@$9|1G|A|1H|B|C]|$9|1I|A|1J|B|C]|$9|1K|A|1L|B|D]]|E|@]|F|$]]|$1|G|3|H|5|6|7|1M|8|@$9|1N|A|1O|B|D]]|E|@]|F|$]]|$1|I|3|J|5|K|7|1P|8|@]|E|@]|F|$L|M]]|$1|N|3|O|5|6|7|1Q|8|@$9|1R|A|1S|B|D]|$9|1T|A|1U|B|D]|$9|1V|A|1W|B|D]]|E|@]|F|$]]|$1|P|3|Q|5|K|7|1X|8|@]|E|@]|F|$L|M]]|$1|R|3|S|5|6|7|1Y|8|@]|E|@]|F|$]]|$1|T|3|U|5|K|7|1Z|8|@]|E|@]|F|$L|M]]|$1|V|3|W|5|6|7|20|8|@$9|21|A|22|B|D]|$9|23|A|24|B|D]]|E|@]|F|$]]|$1|X|3|Y|5|6|7|25|8|@]|E|@]|F|$]]|$1|Z|3|10|5|K|7|26|8|@]|E|@]|F|$L|M]]|$1|11|3|12|5|6|7|27|8|@$9|28|A|29|B|D]]|E|@]|F|$]]|$1|13|3|14|5|6|7|2A|8|@$9|2B|A|2C|B|D]|$9|2D|A|2E|B|D]]|E|@$9|2F|A|2G|1|2H]|$9|2I|A|2J|1|2K]]|F|$]]|$1|15|3|-4|5|6|7|2L|8|@]|E|@]|F|$]]]|16|$17|$5|18|19|1A|F|$1B|1C]]|1D|$5|18|19|1A|F|$1B|1E]]]]

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

To check the ownership of <code>/dev/kvm</code> use

<pre><code>ls -al /dev/kvm
</code></pre>

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

<pre><code>grep kvm /etc/group
</code></pre>

This returned

<pre><code>kvm:x:some_number:
</code></pre>

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

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

<pre><code>sudo adduser $USER kvm
</code></pre>

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

As mentioned by @marcolz, the command <a href="https://linux.die.net/man/1/newgrp" rel="noreferrer"><code>newgrp kvm</code></a> should change the group membership live for you. If that did not work, @Knossos mentioned that you might want to log out and back in (or restart), for the permissions to take effect. Or do as <a href="https://stackoverflow.com/questions/37300811/android-studio-dev-kvm-device-permission-denied/45749003?noredirect=1#comment107714346_45749003">@nmirceac mentioned</a> and re-login in the same shell via <code>su - $USER</code>.

blocks|key|2665041|text|试试这个，它对我很有效：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2665042|2665043|sudo+apt+install+qemu-kvm|ordered-list-item|offset|length|style|CODE|2665044|2665045|2665046|sudo+chown+-R+<username>:<username>+/dev/kvm|2665047|2665048|entityMap^0|0|0|0|P|0|0|0|0|18|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|R|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|S|8|@$F|T|G|U|H|I]]|9|@]|A|$]]|$1|J|3|-4|5|6|7|V|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|W|8|@]|9|@]|A|$]]|$1|L|3|M|5|E|7|X|8|@$F|Y|G|Z|H|I]]|9|@]|A|$]]|$1|N|3|-4|5|6|7|10|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|P|$]]

Try this, it worked for me:
<ol>
<li><code>sudo apt install qemu-kvm</code>
</li>
<li><code>sudo chown -R &lt;username&gt;:&lt;username&gt; /dev/kvm</code>
</li>
</ol>

blocks|key|2875952|text|在Ubuntu18.04中运行以下命令对我来说是有效的sudo+chown+-R+/dev/kvm|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2875953|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

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

blocks|key|2875974|text|这就是我如何让它在Ubuntu18.04中工作的|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2875975|sudo+apt+install+qemu-kvm|code-block|syntax|javascript|2875976|使用以下命令将用户添加到kvm组：|2875977|sudo+adduser+<Replace+with+username>+kvm|2875978|如果仍显示权限被拒绝|2875979|sudo+chown+<Replace+with+username>+/dev/kvm|2875980|试试看。|2875981|entityMap^0|9|B|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|10|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|11|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|12|8|@]|D|@]|E|$]]|$1|Q|3|R|5|H|7|13|8|@]|D|@]|E|$I|J]]|$1|S|3|T|5|6|7|14|8|@]|D|@]|E|$]]|$1|U|3|-4|5|6|7|15|8|@]|D|@]|E|$]]]|V|$]]

This is how I got it to work in Ubuntu 18.04

<pre><code>sudo apt install qemu-kvm
</code></pre>

Add your user to kvm group using:

<pre><code>sudo adduser &lt;Replace with username&gt; kvm
</code></pre>

If still showing permission denied:

<pre><code>sudo chown &lt;Replace with username&gt; /dev/kvm
</code></pre>

Try it.

blocks|key|2875983|text|你有没有尝试过下面的方法，它应该是有效的：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2875984|sudo+chown+<username>+/dev/kvm
sudo+chmod+o%2Bx+/dev/kvm|code-block|syntax|javascript|2875985|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Have you also tried following, it should work:

<pre><code>sudo chown &lt;username&gt; /dev/kvm
sudo chmod o+x /dev/kvm
</code></pre>

blocks|key|2665114|text|我遇到了类似的情况，在/dev/kvm上出现了相同的权限错误。我已经进行了必要的安装，但没有将用户添加到kvm组中，我所要做的就是|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2665115|sudo+adduser+<Replace+with+username>+kvm|code-block|syntax|javascript|2665116|当然，不要忘记重启你的Ubuntu实例。|2665117|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

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

<pre><code>sudo adduser &lt;Replace with username&gt; kvm
</code></pre>

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

blocks|key|2665132|text|在将我的ubuntu更新到18.04.1之后，我得到了这个错误。我只是为模拟器下载新的系统映像，或者你可以说下载新的模拟器，它对我来说是有效的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2665133|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

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.

blocks|key|2876033|text|如果你用sudo打开ide。你不会有这个问题。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2876034|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

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

blocks|key|117412|text|这是因为/dev/kvm不可访问。要从android+studio访问make，请运行以下命令|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|117413|sudo+chmod+777+-R+/dev/kvm|code-block|syntax|javascript|117414|它会要求你输入密码。之后，重启Android+Studio。|117415|rum模拟器需要KVM。如果您还没有安装它，那么就安装它|117416|sudo+apt+install+qemu-kvm|117417|entityMap^0|4|8|0|0|0|8|3|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|V|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|W|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|X|8|@$9|Y|A|Z|B|C]]|D|@]|E|$]]|$1|O|3|P|5|H|7|10|8|@]|D|@]|E|$I|J]]|$1|Q|3|-4|5|6|7|11|8|@]|D|@]|E|$]]]|R|$]]

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

<pre><code>sudo chmod 777 -R /dev/kvm
</code></pre>

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

<code>KVM</code> is required to rum emulator. If you have not install it yet then install it

<pre><code>sudo apt install qemu-kvm
</code></pre>

blocks|key|2665156|text|sudo+setfacl+-m+u:$USER:rwx+/dev/kvm|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|2665157|对我很管用。|unstyled|2665158|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>sudo setfacl -m u:$USER:rwx /dev/kvm
</code></pre>

Worked for me.

blocks|key|2665160|text|我解决了同样的问题，要解决这个问题，只需在Linux客户端的终端中键入以下命令即可|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2665161|+++sudo+apt-get+install+qemu-kvm

++++//+type+your+password

+++sudo+chmod+777+-R+/dev/kvm|code-block|syntax|javascript|2665162|在此之后，尝试运行模拟器，它将工作|2665163|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

I countered the same problem and to solve this issue just type the following commands in terminal for Linux clients

<pre><code> sudo apt-get install qemu-kvm

 // type your password

 sudo chmod 777 -R /dev/kvm
</code></pre>

and after that try running simulator it'll work

blocks|key|114642|text|打开终端并以管理员身份登录|type|unstyled|depth|inlineStyleRanges|entityRanges|data|114643|sudo+su|code-block|syntax|javascript|114644|转到dev文件夹|114645|cd+/dev/|114646|更改kvm模式|114647|chmod+777+-R+kvm|114648|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|S|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|U|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

Open Terminal and log as admin 

<pre><code>sudo su
</code></pre>

Go to the dev folder

<pre><code>cd /dev/
</code></pre>

Change the kvm mode

<pre><code>chmod 777 -R kvm
</code></pre>

blocks|key|115334|text|我正在使用linux+debian，我也面临着同样的问题。在我的AVD中，显示了一条消息"/dev/kvm权限被拒绝“，我试图找到解决方案，然后我要做的是，在终端中键入以下内容：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|115335|sudo+chmod+-R+777+/dev/kvm|code-block|syntax|javascript|115336|它将授予对文件夹/dev/kvm的访问权限，然后再次检查您的AVD，错误消息将消失，希望它能有所帮助。|115337|entityMap^0|W|3|0|0|U|3|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|M|3|-4|5|6|7|V|8|@]|D|@]|E|$]]]|N|$]]

I am using linux debian, and i am facing the same way. In my AVD showing me a message "/dev/kvm permission denied" and i tried to find the solution, then what i do to solve it is, in terminal type this :

<pre><code>sudo chmod -R 777 /dev/kvm
</code></pre>

it will grant an access for folder /dev/kvm,then check again on your AVD , the error message will disappear, hope it will help.

blocks|key|2665186|text|这适用于我在Linux+(x18)☑上的工作，希望它也能用在你身上。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2665187|sudo+chown+hp+/dev/kvm|code-block|syntax|javascript|2665188|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This Worked For Me on Linux (x18) &#9745; Hope It Will Work For You Aswell 

<pre><code>sudo chown hp /dev/kvm
</code></pre>

blocks|key|117477|text|在终端中键入：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|117478|sudo+apt+install+qemu-kvm+-y
sudo+chown+$USER+/dev/kvm|code-block|syntax|javascript|117479|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Type in terminal:

<pre><code>sudo apt install qemu-kvm -y
sudo chown $USER /dev/kvm
</code></pre>

blocks|key|2876122|text|在Ubuntu18.04中，通过使用Jerrin's终端中可用的$USER变量来修复这个错误，对bash答案只做了一点小小的改进。因此，您可以使用以下命令两个命令：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2876123|sudo+apt+install+qemu-kvm|code-block|syntax|javascript|2876124|将当前用户添加到kvm组|2876125|sudo+adduser+$USER+kvm|2876126|另外，如果你仍然有问题，我的另一个问题是我安装Ubuntu的方式。我在安装过程中错误地勾选了安装第三方软件的复选框，该软件不适合我的nvidia显卡开发。所以我重新安装了Ubuntu和这个第三方软件unchecked。|BOLD|2876127|​|2876128|📷|atomic|2876129|2876130|然后在安装后，打开软件和更新，并转到其他驱动程序选项卡。选择也经过测试的最新专有驱动程序并应用更改。应重新启动计算机以使更改生效。|2876131|2876132|2876133|2876134|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/users/4387357/jerin-a-mathews|1|IMAGE|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/f3ce5ef9460a5c40c07facf083cdffaf.png|imageAlt|2|https://ask.qcloudimg.com/http-save/yehe-900000/915c338aad082cef19e4ffe012e957fc.png^0|W|5|I|8|0|0|0|0|0|2R|9|0|0|0|1|1|0|0|0|0|0|1|2|0|0^^$0|@$1|2|3|4|5|6|7|1I|8|@$9|1J|A|1K|B|C]]|D|@$9|1L|A|1M|1|1N]]|E|$]]|$1|F|3|G|5|H|7|1O|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1P|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|1Q|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|1R|8|@$9|1S|A|1T|B|Q]]|D|@]|E|$]]|$1|R|3|S|5|6|7|1U|8|@]|D|@]|E|$]]|$1|T|3|U|5|V|7|1V|8|@]|D|@$9|1W|A|1X|1|1Y]]|E|$]]|$1|W|3|S|5|6|7|1Z|8|@]|D|@]|E|$]]|$1|X|3|Y|5|6|7|20|8|@]|D|@]|E|$]]|$1|Z|3|S|5|6|7|21|8|@]|D|@]|E|$]]|$1|10|3|U|5|V|7|22|8|@]|D|@$9|23|A|24|1|25]]|E|$]]|$1|11|3|S|5|6|7|26|8|@]|D|@]|E|$]]|$1|12|3|-4|5|6|7|27|8|@]|D|@]|E|$]]]|13|$14|$5|15|16|17|E|$18|19]]|1A|$5|1B|16|1C|E|$1D|1E|1F|-4]]|1G|$5|1B|16|1C|E|$1D|1H|1F|-4]]]]

Just one slight improvement on <a href="https://stackoverflow.com/users/4387357/jerin-a-mathews">Jerrin's</a> answer on fixing this error with Ubuntu 18.04 by utilizing <code>$USER</code> variable available in the bash terminal. So you could use the following commands two commands: 

<pre><code>sudo apt install qemu-kvm
</code></pre>

Add the current user to the kvm group

<pre><code>sudo adduser $USER kvm
</code></pre>

Also if you are still having issues, one other problem for me was the way in which I installed Ubuntu. I made the mistake of checking the box during installation for installing 3rd party software which did not play nice with my nvidia graphics card for development. So I reinstalled Ubuntu with this third party software unchecked.

<a href="https://i.stack.imgur.com/sITSt.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/sITSt.png" alt="enter image description here"></a>

Then after installation, open up Software &amp; Updates and go to the Additional Drivers tab. Select the most up to date proprietary drivers that have also been tested and apply changes. Should restart the machine for the changes to take affect. 

<a href="https://i.stack.imgur.com/D4Re1.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/D4Re1.png" alt="enter image description here"></a>

blocks|key|2665273|text|sudo+chown+$USER+/dev/kvm|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|2665274|2019年9月，我在这里简单地运行了这一条命令：|unstyled|2665275|2665276|说明:Ubuntu18.04.3|blockquote|2665277|2665278|LTS版本:+18.04|2665279|代号:仿生|2665280|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|S|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|T|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|U|8|@]|9|@]|A|$]]|$1|K|3|-4|5|F|7|V|8|@]|9|@]|A|$]]|$1|L|3|M|5|F|7|W|8|@]|9|@]|A|$]]|$1|N|3|O|5|F|7|X|8|@]|9|@]|A|$]]|$1|P|3|-4|5|F|7|Y|8|@]|9|@]|A|$]]]|Q|$]]

<pre><code>sudo chown $USER /dev/kvm
</code></pre>
Simply running that one command worked for me here in September 2019 running:
<blockquote>
Description: Ubuntu 18.04.3
LTS Release: 18.04
Codename: bionic
</blockquote>

blocks|key|2876157|text|我使用的是ubuntu+18.04。我也面临着同样的问题。我在终端上运行这段命令，问题就解决了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2876158|sudo+chown+$USER+/dev/kvm|code-block|syntax|javascript|2876159|上面的命令适用于系统中的所有用户。|2876160|如果您只想将访问权限授予特定用户，则运行以下命令|2876161|sudo+chown+UserNameHere+/dev/kvm|2876162|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|S|8|@]|9|@]|A|$E|F]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

I am using ubuntu 18.04. I was facing the same problem. I run this piece of command in terminal and problem is resolved.

<pre><code>sudo chown $USER /dev/kvm
</code></pre>

the above command is for all the user present in your system.

If you want to give access to only a specific user then run this command

<pre><code>sudo chown UserNameHere /dev/kvm
</code></pre>

blocks|key|117555|text|如果您只想运行Android+Studio+Emulator，那么完全没有必要安装qemu-kvm+(及其所有依赖项)。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|117556|您需要做的唯一一件事就是授予您的用户(即您登录的那个用户)访问/dev/kvm-device的权限。|117557|这只需三个简单的步骤即可完成。|117558|优先：|BOLD|117559|创建kvm-group|117560|groupadd+-r+kvm|117561|选项-r可创建系统组，即具有GID+<=+999+(请参见/etc/login.defs+=>+SYS_GID_MAX)|117562|Second:|117563|更改/dev/kvm上的权限。这可以作为qemu-kvm-installation的一部分来完成，因为其中一个依赖项是安装qemu-system-common+(在当前的Ubuntu系统上，包名称可能会有所不同)，这反过来会安装包含以下内容的文件/lib/udev/rules.d/60-qemu-system-common.rules：|117564|KERNEL=="kvm",+GROUP="kvm",+MODE="0660"|code-block|syntax|javascript|117565|因此，如果您只是创建一个包含以上行的文件/etc/udev/rules.d/60-qemu-permissions.rules，那么您已经完成了第一步。|117566|第三：|117567|通过执行以下命令将您的用户名添加到组中|117568|usermod+-a+-G+kvm+<your_username>+-+-a对于将用户添加到kvm-非常重要。否则，您将覆盖用户的组设置，使其仅属于"kvm"...|117569|就这样。|117570|要使新的udev规则和组设置生效，最容易的方法是重新启动并再次登录。|117571|您还可以执行|117572|udevadm+control+--reload-rules+&&+udevadm+trigger|117573|用于重新加载规则，但对于新组，您仍然需要注销并重新登录。|117574|entityMap^0|15|8|0|V|8|0|0|0|3|0|2|3|0|0|F|0|2|2|T|F|1C|B|0|0|7|0|2|8|K|8|1P|I|3F|19|0|0|K|17|0|0|3|0|0|0|X|10|2|14|A|0|0|0|0|0|1D|0|0^^$0|@$1|2|3|4|5|6|7|1L|8|@$9|1M|A|1N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1O|8|@$9|1P|A|1Q|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|1R|8|@]|D|@]|E|$]]|$1|J|3|K|5|6|7|1S|8|@$9|1T|A|1U|B|L]]|D|@]|E|$]]|$1|M|3|N|5|6|7|1V|8|@$9|1W|A|1X|B|C]]|D|@]|E|$]]|$1|O|3|P|5|6|7|1Y|8|@$9|1Z|A|20|B|C]]|D|@]|E|$]]|$1|Q|3|R|5|6|7|21|8|@$9|22|A|23|B|C]|$9|24|A|25|B|C]|$9|26|A|27|B|C]]|D|@]|E|$]]|$1|S|3|T|5|6|7|28|8|@$9|29|A|2A|B|L]]|D|@]|E|$]]|$1|U|3|V|5|6|7|2B|8|@$9|2C|A|2D|B|C]|$9|2E|A|2F|B|C]|$9|2G|A|2H|B|C]|$9|2I|A|2J|B|C]]|D|@]|E|$]]|$1|W|3|X|5|Y|7|2K|8|@]|D|@]|E|$Z|10]]|$1|11|3|12|5|6|7|2L|8|@$9|2M|A|2N|B|C]]|D|@]|E|$]]|$1|13|3|14|5|6|7|2O|8|@$9|2P|A|2Q|B|L]]|D|@]|E|$]]|$1|15|3|16|5|6|7|2R|8|@]|D|@]|E|$]]|$1|17|3|18|5|6|7|2S|8|@$9|2T|A|2U|B|C]|$9|2V|A|2W|B|C]|$9|2X|A|2Y|B|L]]|D|@]|E|$]]|$1|19|3|1A|5|6|7|2Z|8|@]|D|@]|E|$]]|$1|1B|3|1C|5|6|7|30|8|@]|D|@]|E|$]]|$1|1D|3|1E|5|6|7|31|8|@]|D|@]|E|$]]|$1|1F|3|1G|5|6|7|32|8|@$9|33|A|34|B|C]]|D|@]|E|$]]|$1|1H|3|1I|5|6|7|35|8|@]|D|@]|E|$]]|$1|1J|3|-4|5|6|7|36|8|@]|D|@]|E|$]]]|1K|$]]

There's absolutely no need to install <code>qemu-kvm</code> (and all its dependencies) if you only want to run the Android Studio Emulator.

The only thing you have to do is to give your user (i.e. the one you are logged in with) the right to access the <code>/dev/kvm</code>-device.

This is done in three simple steps.

First:

Create the <code>kvm</code>-group

<code>groupadd -r kvm</code>

The option <code>-r</code> creates a system group, i.e. with a GID &lt;= 999 (see <code>/etc/login.defs</code> => <code>SYS_GID_MAX</code>)

Second:

Change permissions on <code>/dev/kvm</code>. This could be done as part of the <code>qemu-kvm</code>-installation, because one of the dependencies is installing <code>qemu-system-common</code> (on current Ubuntu systems, package name may vary), which in turn installs the file <code>/lib/udev/rules.d/60-qemu-system-common.rules</code> containing the following:

<pre><code>KERNEL=="kvm", GROUP="kvm", MODE="0660"
</code></pre>

So if you are just create a file <code>/etc/udev/rules.d/60-qemu-permissions.rules</code> containing the above line, you are done with the first step.

Third:

Add your username to the group by executing

<code>usermod -a -G kvm &lt;your_username&gt;</code> - the <code>-a</code> is important for adding your user to the kvm-group. Without that you will overwrite the group-settings for your user to only belonging to "kvm"...

That's it.

For the new udev rule and group setting to take effect it's easiest to reboot and login again.

You can also execute

<code>udevadm control --reload-rules &amp;&amp; udevadm trigger</code>

for reloading the rules but you still have to logout and login again with regard to the new group.

blocks|key|2876189|text|这是一个简单的解决方案|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2876190|打开终端并运行以下命令|2876191|sudo+groupadd+-r+kvm|code-block|syntax|javascript|2876192|​|2876193|sudo+gedit+/lib/udev/rules.d/60-qemu-system-common.rules|2876194|将以下行添加到打开的文件中并保存它|2876195|2876196|+KERNEL=="kvm"，GROUP="kvm"，MODE="0660“|blockquote|2876197|2876198|2876199|最后运行：|2876200|sudo+usermod+-a+-G+kvm+<your_username>|2876201|重新启动你的电脑，然后完成！|2876202|entityMap^0|0|0|0|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|13|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|14|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|15|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|16|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|17|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|18|8|@]|9|@]|A|$]]|$1|P|3|Q|5|R|7|19|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]|$1|T|3|-4|5|6|7|1B|8|@]|9|@]|A|$]]|$1|U|3|V|5|6|7|1C|8|@]|9|@]|A|$]]|$1|W|3|X|5|F|7|1D|8|@]|9|@]|A|$G|H]]|$1|Y|3|Z|5|6|7|1E|8|@]|9|@]|A|$]]|$1|10|3|-4|5|6|7|1F|8|@]|9|@]|A|$]]]|11|$]]

<h2>Here is a simple solution</h2>
<h3>open the terminal and run the following commands</h3>
<pre><code>sudo groupadd -r kvm
</code></pre>
<h1></h1>
<pre><code>sudo gedit /lib/udev/rules.d/60-qemu-system-common.rules
</code></pre>
Add the following line to the opened file and save it
<blockquote>
KERNEL==&quot;kvm&quot;, GROUP=&quot;kvm&quot;, MODE=&quot;0660&quot;
</blockquote>
Finally run:
<pre><code>sudo usermod -a -G kvm &lt;your_username&gt;
</code></pre>
Reboot your PC and Done!

blocks|key|114709|text|最终在Ubuntu+18.04上为我修复的是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|114710|sudo+apt+install+qemu-kvm
sudo+adduser+$USER+kvm
sudo+chown+$USER+/dev/kvm|code-block|syntax|javascript|114711|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

What finally fixed it for me on Ubuntu 18.04 was:

<pre><code>sudo apt install qemu-kvm
sudo adduser $USER kvm
sudo chown $USER /dev/kvm
</code></pre>

blocks|key|115426|text|尽管KVM是内置于Linux内核本身的一个模块，但这并不意味着默认情况下所有必需的软件包都包含在Ubuntu/Linux安装中。您需要几个才能入门，可以使用以下命令在终端中安装它们：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|115427|&+sudo+apt+install+qemu-kvm+libvirt-clients+libvirt-daemon-system+bridge-utils+virt-manager++++|code-block|syntax|javascript|115428|配置网桥|offset|length|style|BOLD|115429|为了让您的虚拟机能够访问您的网络接口并为其分配自己的IP地址，我们需要在我们的系统上配置桥接网络。|115430|首先，运行以下Linux命令，以找出分配给您的网络接口的名称。了解这一点将允许我们稍后进行额外的配置。|115431|$+ip+a+++++|115432|​|115433|📷|atomic|115434|在我的例子中，网络接口称为enp2s0。你的名字可能会非常相似。|CODE|115435|为了告诉Ubuntu我们希望桥接我们的连接，我们需要编辑网络接口配置文件。这样做根本不会对你的连接产生负面影响。它只允许与VM共享该连接。|115436|使用code+(Visual+Studio+Code)或您喜欢的文本编辑器打开以下文件：|115437|$+code+/etc/network/interfaces+++++|115438|当您第一次打开此文件时，它可能是空的或只包含几行。您的网桥接口名为br0，因此为默认情况下打开的接口添加以下行：|115439|auto+br0++++|115440|在这一行下面，为您当前的网络接口(您之前确定的那个网络接口)添加以下行。|115441|iface+enp2s0+inet+manual|115442|接下来，您可以添加桥信息。这些行告诉Ubuntu您的网桥将使用DHCP进行自动IP地址分配，并且您的网桥将管理您的当前接口。|115443|iface+br0+inet+dhcp
++++++bridge_ports+enp2s0|115444|这是应用所有更改后文件的外观(如果您也有几行已经存在，也可以有它们)：|115445|115446|115447|115448|保存更改并退出文件。|115449|将您的用户添加到组|115450|为了在没有root权限的情况下管理虚拟机，您的用户需要属于两个用户组。运行以下命令将您的用户添加到适当的组(将user1替换为您的用户名)：|115451|$+sudo+adduser+user1+libvirt
$+sudo+adduser+user1+libvirt-qemu
$+sudo+adduser+user1+kvm|115452|完成后，您应该重新启动系统，以确保对用户和网络配置所做的所有更改都有机会生效。|115453|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/36ef185cc3083f8fde6639c932903e47.jpeg|imageAlt|1|https://ask.qcloudimg.com/http-save/yehe-900000/8cfa3dae45249ac676d28369ab27c09d.png^0|0|0|0|4|0|0|0|0|0|0|1|0|0|D|6|0|0|2|4|0|0|X|3|0|0|0|0|0|0|0|0|0|1|1|0|0|0|0|9|0|0|0|0^^$0|@$1|2|3|4|5|6|7|28|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|29|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|2A|8|@$I|2B|J|2C|K|L]]|9|@]|A|$]]|$1|M|3|N|5|6|7|2D|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|2E|8|@]|9|@]|A|$]]|$1|Q|3|R|5|D|7|2F|8|@]|9|@]|A|$E|F]]|$1|S|3|T|5|6|7|2G|8|@]|9|@]|A|$]]|$1|U|3|V|5|W|7|2H|8|@]|9|@$I|2I|J|2J|1|2K]]|A|$]]|$1|X|3|Y|5|6|7|2L|8|@$I|2M|J|2N|K|Z]]|9|@]|A|$]]|$1|10|3|11|5|6|7|2O|8|@]|9|@]|A|$]]|$1|12|3|13|5|6|7|2P|8|@$I|2Q|J|2R|K|Z]]|9|@]|A|$]]|$1|14|3|15|5|D|7|2S|8|@]|9|@]|A|$E|F]]|$1|16|3|17|5|6|7|2T|8|@$I|2U|J|2V|K|Z]]|9|@]|A|$]]|$1|18|3|19|5|D|7|2W|8|@]|9|@]|A|$E|F]]|$1|1A|3|1B|5|6|7|2X|8|@]|9|@]|A|$]]|$1|1C|3|1D|5|D|7|2Y|8|@]|9|@]|A|$E|F]]|$1|1E|3|1F|5|6|7|2Z|8|@]|9|@]|A|$]]|$1|1G|3|1H|5|D|7|30|8|@]|9|@]|A|$E|F]]|$1|1I|3|1J|5|6|7|31|8|@]|9|@]|A|$]]|$1|1K|3|T|5|6|7|32|8|@]|9|@]|A|$]]|$1|1L|3|V|5|W|7|33|8|@]|9|@$I|34|J|35|1|36]]|A|$]]|$1|1M|3|T|5|6|7|37|8|@]|9|@]|A|$]]|$1|1N|3|1O|5|6|7|38|8|@]|9|@]|A|$]]|$1|1P|3|1Q|5|6|7|39|8|@$I|3A|J|3B|K|L]]|9|@]|A|$]]|$1|1R|3|1S|5|6|7|3C|8|@]|9|@]|A|$]]|$1|1T|3|1U|5|D|7|3D|8|@]|9|@]|A|$E|F]]|$1|1V|3|1W|5|6|7|3E|8|@]|9|@]|A|$]]|$1|1X|3|-4|5|6|7|3F|8|@]|9|@]|A|$]]]|1Y|$1Z|$5|20|21|22|A|$23|24|25|-4]]|26|$5|20|21|22|A|$23|27|25|-4]]]]

Although KVM is a module built into the Linux kernel itself, it doesn't mean that all the necessary packages are included in your Ubuntu/Linux install by default. You'll need a few to get started, and they can be installed with this command in the terminal: 

<pre><code>&amp; sudo apt install qemu-kvm libvirt-clients libvirt-daemon-system bridge-utils virt-manager 
</code></pre>

Configure the network bridge 

In order for your virtual machines to access your network interface and be assigned their own IP addresses, we need to configure bridged networking on our system.

First, run the following Linux command in order to find out what name your network interface has been assigned. Knowing this will allow us to do additional configuration later. 

<pre><code>$ ip a 
</code></pre>

<a href="https://i.stack.imgur.com/BG9bM.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/BG9bM.jpg" alt="Determine name of network interface"></a> 

In my case, the network interface is called <code>enp2s0</code>. Yours will likely be very similarly named.

In order to tell Ubuntu that we want our connection to be bridged, we'll need to edit the network interfaces configuration file. Doing this won't negatively impact your connection at all. It'll just allow that connection to be shared with the VMs. 

Use <code>code</code> (Visual Studio Code) or your favorite text editor to open the following file:

<pre><code>$ code /etc/network/interfaces 
</code></pre>

When you first open this file, it may be empty or contain just a couple of lines. Your bridge interface is called <code>br0</code>, so add the following line for the interface to come up by default: 

<pre><code>auto br0 
</code></pre>

Below this line, add the following line for your current network interface (the one who's named you determined earlier).

<pre><code>iface enp2s0 inet manual
</code></pre>

Next, you can add the bridge information. These lines tell Ubuntu that your bridge will use DHCP for automatic IP address assignment, and your bridge will manage your current interface. 

<pre><code>iface br0 inet dhcp
 bridge_ports enp2s0
</code></pre>

This is how your file should look once all the changes have been applied (if you also have a couple of lines that were already there, it's fine to have them too):

<a href="https://i.stack.imgur.com/u8jLh.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/u8jLh.png" alt="Network interfaces configuation file"></a>

Save your changes and exit the file.

Add your user to the groups 

In order to manage your virtual machine(s) without root privileges, your user will need to belong to two user groups. Run the following commands to add your user to the appropriate groups (replacing user1 with the name of your user):

<pre><code>$ sudo adduser user1 libvirt
$ sudo adduser user1 libvirt-qemu
$ sudo adduser user1 kvm
</code></pre>

When you're done, you should restart your system to ensure that all of the changes done to your user and network configuration have a chance to take effect.

blocks|key|117568|text|为了在Linux中创建虚拟设备-我必须遵循这三个命令，它可以帮助我避免构建avd设备的麻烦-过程是-|type|unstyled|depth|inlineStyleRanges|entityRanges|data|117569|sudo+apt+install+qemu-kvm
sudo+adduser+$USER+kvm
sudo+chown+$USER+/dev/kvm+|code-block|syntax|javascript|117570|现在，您可以开始了，重新启动android+studio并开始使用仿真器构建应用程序。|117571|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

In order to make a virtual device in Linux - I have to follow this three command and it helps me to avoid trouble for building avd devices - the process are -

<pre class="lang-sh prettyprint-override"><code>sudo apt install qemu-kvm
sudo adduser $USER kvm
sudo chown $USER /dev/kvm 
</code></pre>

so, now you are good to go, restart android studio and start building application with emulator.

blocks|key|115455|text|使用此命令提供适当的权限|type|unstyled|depth|inlineStyleRanges|entityRanges|data|115456|sudo+chmod+777+-R+/dev/kvm|code-block|syntax|javascript|115457|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Provide appropriate permissions with this command

<pre><code>sudo chmod 777 -R /dev/kvm
</code></pre>

blocks|key|115491|text|在Ubuntu下，/dev/kvm的权限通常是这样的：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|115492|$+ls+-l+/dev/kvm
crw-rw----+1+root+kvm+10,+232+May+24+09:54+/dev/kvm|code-block|syntax|javascript|115493|115494|因此，获取访问权限的方法基本上有两种：|115495|115496|确保您的用户是kvm组的一部分(需要您的用户在更改后重新登录)|unordered-list-item|115497|扩大该设备的权限，使您的用户具有访问权限(需要更改udev守护进程的kvm|115498|115499|将用户添加到KVM组|115500|检查您的用户是否已经是kvm组的成员，例如：|115501|$+id+
uid=1000(juser)+gid=1000(juser)+groups=1000(juser),10(wheel)|115502|如果不是，则添加它，例如：|115503|$+sudo+usermod+--append+--groups+kvm+juser|115504|更改后，您必须注销并重新登录，才能使组更改生效(请使用id再次检查)。|115505|扩大权限|115506|或者，您可以只扩大/dev/kvm设备的权限。|115507|示例：|115508|echo+'KERNEL=="kvm",+GROUP="kvm",+MODE="0666",+OPTIONS%2B="static_node=kvm"'+\
++++%7C+sudo+tee+/etc/udev/rules.d/99-kvm4all.rules
sudo+udevadm+control+--reload-rules
sudo+udevadm+trigger+--name-match=kvm|115509|FWIW，这是Fedora和CentOS等其他发行版的默认设置。|115510|使用另一个ls检查上述命令的有效性。您应该会看到类似以下内容的输出：|115511|$+ls+-l+/dev/kvm
crw-rw-rw-.+1+root+kvm+10,+232+2020-05-16+09:19+/dev/kvm|115512|最大的优点:您不需要注销并重新登录即可使此更改生效。|115513|非解决方案|115514|115515|直接在/dev/kvm上调用chmod和chown+-+1)这些更改在重启后不会持久，2)因为/dev/kvm权限由udev守护进程控制，所以它可以随时“修复”它的权限。例如，在每个仿真器运行后，将可执行权限添加到设备-您的仿真器只需要递归地在|115516|上读取和写入permissions|115517|changing权限-我不知道这是怎么回事-看起来像cargo+cult|115518|installing额外的软件包，如qemu+-您已经安装了仿真器-您只需访问/dev/kvm+/dev/kvm+|115519|115520|entityMap^0|9|8|0|0|0|0|0|0|0|0|0|0|0|0|0|R|2|0|0|9|8|0|0|0|0|5|2|0|0|0|0|0|3|8|E|5|K|5|1B|8|0|0|0|13|8|1C|8|0|0^^$0|@$1|2|3|4|5|6|7|20|8|@$9|21|A|22|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|23|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|24|8|@]|D|@]|E|$]]|$1|L|3|M|5|6|7|25|8|@]|D|@]|E|$]]|$1|N|3|-4|5|6|7|26|8|@]|D|@]|E|$]]|$1|O|3|P|5|Q|7|27|8|@]|D|@]|E|$]]|$1|R|3|S|5|Q|7|28|8|@]|D|@]|E|$]]|$1|T|3|-4|5|6|7|29|8|@]|D|@]|E|$]]|$1|U|3|V|5|6|7|2A|8|@]|D|@]|E|$]]|$1|W|3|X|5|6|7|2B|8|@]|D|@]|E|$]]|$1|Y|3|Z|5|H|7|2C|8|@]|D|@]|E|$I|J]]|$1|10|3|11|5|6|7|2D|8|@]|D|@]|E|$]]|$1|12|3|13|5|H|7|2E|8|@]|D|@]|E|$I|J]]|$1|14|3|15|5|6|7|2F|8|@$9|2G|A|2H|B|C]]|D|@]|E|$]]|$1|16|3|17|5|6|7|2I|8|@]|D|@]|E|$]]|$1|18|3|19|5|6|7|2J|8|@$9|2K|A|2L|B|C]]|D|@]|E|$]]|$1|1A|3|1B|5|6|7|2M|8|@]|D|@]|E|$]]|$1|1C|3|1D|5|H|7|2N|8|@]|D|@]|E|$I|J]]|$1|1E|3|1F|5|6|7|2O|8|@]|D|@]|E|$]]|$1|1G|3|1H|5|6|7|2P|8|@$9|2Q|A|2R|B|C]]|D|@]|E|$]]|$1|1I|3|1J|5|H|7|2S|8|@]|D|@]|E|$I|J]]|$1|1K|3|1L|5|6|7|2T|8|@]|D|@]|E|$]]|$1|1M|3|1N|5|6|7|2U|8|@]|D|@]|E|$]]|$1|1O|3|-4|5|6|7|2V|8|@]|D|@]|E|$]]|$1|1P|3|1Q|5|Q|7|2W|8|@$9|2X|A|2Y|B|C]|$9|2Z|A|30|B|C]|$9|31|A|32|B|C]|$9|33|A|34|B|C]]|D|@]|E|$]]|$1|1R|3|1S|5|6|7|35|8|@]|D|@]|E|$]]|$1|1T|3|1U|5|Q|7|36|8|@]|D|@]|E|$]]|$1|1V|3|1W|5|Q|7|37|8|@$9|38|A|39|B|C]|$9|3A|A|3B|B|C]]|D|@]|E|$]]|$1|1X|3|-4|5|6|7|3C|8|@]|D|@]|E|$]]|$1|1Y|3|-4|5|6|7|3D|8|@]|D|@]|E|$]]]|1Z|$]]

Under Ubuntu, the permissions of <code>/dev/kvm</code> usually look like this:
<pre><code>$ ls -l /dev/kvm
crw-rw---- 1 root kvm 10, 232 May 24 09:54 /dev/kvm
</code></pre>
The user that runs the Android emulator (i.e. your user) needs to get access to this device.
Thus, there are basically 2 ways how to get access:
<ul>
<li>Make sure that your user is part of the kvm group (requires a re-login of your user after the change)</li>
<li>Widen the permissions of that device such that your user has access (requires a change to the udev daemon configuration)</li>
</ul>
<h2>Add User to KVM Group</h2>
Check if your user is already part of the kvm group, e.g.:
<pre><code>$ id 
uid=1000(juser) gid=1000(juser) groups=1000(juser),10(wheel)
</code></pre>
If it isn't then add it with e.g.:
<pre><code>$ sudo usermod --append --groups kvm juser
</code></pre>
After that change you have to logout and login again to make the group change effective (check again with <code>id</code>).
<h2>Widen Permissions</h2>
Alternatively, you can just can widen the permissions of the <code>/dev/kvm</code> device.
Example:
<pre><code>echo 'KERNEL==&quot;kvm&quot;, GROUP=&quot;kvm&quot;, MODE=&quot;0666&quot;, OPTIONS+=&quot;static_node=kvm&quot;' \
 | sudo tee /etc/udev/rules.d/99-kvm4all.rules
sudo udevadm control --reload-rules
sudo udevadm trigger --name-match=kvm
</code></pre>
FWIW, this is the default on other distributions such as Fedora and CentOS.
Check the effectiveness of the above commands with another <code>ls</code>. You should see output similar to:
<pre><code>$ ls -l /dev/kvm
crw-rw-rw-. 1 root kvm 10, 232 2020-05-16 09:19 /dev/kvm
</code></pre>
Big advantage: You don't need to logout and login again for this change to be effective.
<h2>Non-Solutions</h2>
<ul>
<li>calling <code>chmod</code> and <code>chown</code> directly on <code>/dev/kvm</code> - 1) these changes aren't persistent over reboots and 2) since <code>/dev/kvm</code> permissions are controlled by the udev daemon, it can 'fix' its permissions at any time, e.g. after each emulator run</li>
<li>adding executable permissions to <code>/dev/kvm</code> - your emulator just requires read and write permissions</li>
<li>changing permissions recursively on <code>/dev/kvm</code> - I don't know what's up with that - looks like cargo cult</li>
<li>installing extra packages like qemu - you already have your emulator installed - you just need to get access to the <code>/dev/kvm</code> device</li>
</ul>

blocks|key|114795|text|type|unstyled|depth|inlineStyleRanges|entityRanges|data|114796|我试过sudo+setfacl+-m+u:UserName:rwx+/dev/kvm了。而且还能用。|ordered-list-item|offset|length|style|CODE|114797|114798|在android+studio中，您需要更改：+avd+|114799|>(选择笔编辑您的设备，并将‘|114800|’从自动更改为软件)以避免仿真器可绘制错误|114801|114802|entityMap^0|0|3|13|0|0|0|0|0|0^^$0|@$1|2|3|-4|4|5|6|R|7|@]|8|@]|9|$]]|$1|A|3|B|4|C|6|S|7|@$D|T|E|U|F|G]]|8|@]|9|$]]|$1|H|3|-4|4|5|6|V|7|@]|8|@]|9|$]]|$1|I|3|J|4|5|6|W|7|@]|8|@]|9|$]]|$1|K|3|L|4|C|6|X|7|@]|8|@]|9|$]]|$1|M|3|N|4|C|6|Y|7|@]|8|@]|9|$]]|$1|O|3|-4|4|5|6|Z|7|@]|8|@]|9|$]]|$1|P|3|-4|4|5|6|10|7|@]|8|@]|9|$]]]|Q|$]]

<ol>
<li>I tried <code>sudo setfacl -m u:UserName:rwx /dev/kvm</code> . and it works .
</li>
<li>In the android studio you need to change : tools&gt; avd manager &gt;(chose the pen to edit your device and change 'graphics' from automatic to software ) to avoid emulator drawable error
</li>
</ol>

blocks|key|117680|text|步骤1:+(安装qemu-kvm)|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|117681|sudo+apt+install+qemu-kvm|code-block|syntax|javascript|117682|kvm第2步：(使用将用户添加到kvm组)|117683|sudo+adduser+username+kvm|117684|第3步：(如果仍显示权限被拒绝)|117685|sudo+chown+username+/dev/kvm|117686|最后一步：|117687|ls+-al+/dev/kvm|117688|entityMap^0|0|4|0|0|0|0|0|4|0|0|0|5|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|11|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|12|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|13|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|14|8|@$9|15|A|16|B|C]]|D|@]|E|$]]|$1|Q|3|R|5|H|7|17|8|@]|D|@]|E|$I|J]]|$1|S|3|T|5|6|7|18|8|@$9|19|A|1A|B|C]]|D|@]|E|$]]|$1|U|3|V|5|H|7|1B|8|@]|D|@]|E|$I|J]]|$1|W|3|-4|5|6|7|1C|8|@]|D|@]|E|$]]]|X|$]]

Step 1: (Install qemu-kvm)
<pre><code>sudo apt install qemu-kvm
</code></pre>
Step 2: (Add your user to kvm group using)
<pre><code>sudo adduser username kvm
</code></pre>
Step 3: (If still showing permission denied)
<pre><code>sudo chown username /dev/kvm
</code></pre>
Final step:
<pre><code>ls -al /dev/kvm
</code></pre>

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

<blockquote>
 /dev/kvm permission denied. 
</blockquote>

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

Android Studio: /dev/kvm device permission denied

Android Studio

Visual Studio

Linux Mint

虚拟机

Android

CentOS

Ubuntu

Fedora

Linux

DHCP

当我试图在模拟器上运行我的Android应用程序时，我得到了这个错误：拒绝 /dev/kvm权限。我检查了权限，并将当前登录的用户添加到kvm组。怎么啦？

问Android Studio: /dev/kvm设备权限被拒绝
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