CODEWITHSUNDEEP
androidandroid-emulatorintelhaxm
Joshua Frank
Joshua Frank

Reputation: 13848

How do I fix "Failed to sync vcpu reg" error?

I'm trying to use the Intel HAX x86 emulator for Windows (8, if that matters). I installed everything and created an AVD for the android version, and everything appears correct, but when I run it, I get this output:

Starting emulator for AVD 'x86_QVGA_Level10'
emulator: device fd:1044
HAX is working and emulator runs in fast virt mode
emulator: Failed to sync vcpu reg
emulator: Failed to sync HAX vcpu context

and the emulator won't run. The significant part of this error (Failed to sync vcpu reg) is not mentioned ANYWHERE online, except in the source code for the HAX itself, but I can't figure out how to make any sense of this.

Can anyone advise about how to get past this error? I really need to get this working, because debugging on device and in the default emulators is painfully slow.

Upvotes: 160

Views: 47923

Answers (30)

gaborous
gaborous

Reputation: 16600

I had installed manually HAXM v7.8.0 following Android Studio suggestions because it could not be installed automatically, but v7.8.0 dropped support for older qemu versions that Android Studio uses, so I had to uninstall and downgrade to v7.6.5, which I installed through Android Studio > Tools > SDK Manager > SDK Tools > Intel x86 Emulator Accelerator (HAXM installer). HAXM v7.7.1 also works according to other users feedbacks.

This is kind of similar but inverted issue that John Delaney reported in another answer. I already wrote the above as a comment, I write it now as an answer since it appears it helped several people so it seems pretty common currently (as of December 2022 / January 2023).

Upvotes: 0

raj
raj

Reputation: 175

Do you have HP SureClick running? I had the same problem on the HP laptop until I disabled it.

HP SureClick is a security protection program which runs "unsafe" programs in micro-VMs. It may also be called HP Wolf Security on your machine, which is the new name for it, although under the hood (e.g. folders, dialogs etc) it's still called SureClick. It may have some processes visible in Task Manager with a prefix of "Br", which stands for Bromium.

Similarly to other answers, it cannot be running at the same time as Android Emulator, as it is basically a virtual machine.

Here are some steps to disable it (not all may be required but this worked for me):

  1. Right click on "HP SureClick" or "HP Wolf" in your system tray and select "Disable Threat Containment". It will pop up a dialog asking for the reason (optional), so just click OK
  2. Right click on the icon again and select "Disable Malware Protection"
  3. Click Start, type "services", open the Services window and set all "HP SureClick" services to disabled by right-clicking on each -> Properties -> change startup type to Disabled (for me there were 3 such services)
  4. Restart the computer

After doing this, I was able to use Android Emulator again :)

Upvotes: 14

eranga
eranga

Reputation: 557

I'm running boot2docker vm, just down it solved the issue.

boot2docker down

Upvotes: 3

Rukmal Dias
Rukmal Dias

Reputation: 3262

This happened to me also when I was trying to run both VirtualBox and Android emulator in a MacOS machine. As others have mentioned above currently it is not possible to run both (i.e. VirtualBox and X86 -Intel based emulator) in MacOS and not sure about the other platforms. If we need to run both we can choose ARM based emulator. (arm based emulators are normally slow)

Upvotes: 5

prayagupadhyay
prayagupadhyay

Reputation: 31232

As mentioned by other answers, make sure no VirtualBox and docker service is running with following command in mac. (systemctl in Linux)

$ launchctl list | grep 'VirtualBox\|docker'
-       0   com.docker.helper
640     0   com.docker.docker.2032
31736   0   org.virtualbox.app.VirtualBox.948

If so, kill the VBox and docker service.

launchctl stop org.virtualbox.app.VirtualBox.948
launchctl stop com.docker.docker.2032

Upvotes: 14

Jucke
Jucke

Reputation: 71

Quick steps:

  1. Stop all VirtualBox Virtual Machines (i.e. vagrant halt), quit VirtualBox.
  2. All docker-machines should be stopped, too. Quit Docker.

Upvotes: 5

geowa4
geowa4

Reputation: 41833

Yes, VirtualBox VMs have to be stopped. I also had to stop Docker for Mac. The error message only mentions VirtualBox, which confused me a little until I realized Docker for Mac is running xhyve.

Upvotes: 2

MANISH PATHAK
MANISH PATHAK

Reputation: 2650

  1. Stop GENYMOTION (open VirtualBox instance if any instance is running, stop it).
  2. Open AndroidStudio -> Run AVD Manager-> run AndroidStudio virtual device.

Latest Android Emulators are not able to run in parallel with GENYMOTION

Upvotes: 12

user6118264
user6118264

Reputation:

If you are running Docker you would have to take the virtual machine down

docker-machine stop default

This assumes your docker machine is called default. If you want to check the name use docker-machine ls

A simpler solution; open virtuabox and stop the vm :-)

Upvotes: 61

Ruslan Gilmutdinov
Ruslan Gilmutdinov

Reputation: 1417

Fixed the problem by changing current version of Java within Windows from Java 8 x64 to Java 7 x86.

Upvotes: 2

rlfrahm
rlfrahm

Reputation: 359

For me the answer was to set Enable keyboard input to true under the advanced settings of the virtual device.

This was the first option I changed on the device, so it is possible that the act of changed an option fixes the error as well based on the wide array of answers above.

Note: I've confirmed previously that no VM's are running.

Upvotes: 1

Arun Abraham
Arun Abraham

Reputation: 4037

If you are having any virtual machines running, suspend them and try again.

Upvotes: 1

user213493
user213493

Reputation: 892

This is the VirtualBox ticket - https://www.virtualbox.org/ticket/14294

Upvotes: 2

Revs
Revs

Reputation: 191

I faced this issue because I had my virtual box running with Ubuntu on it. When I shut down my virtual box I did not face this issue.

Upvotes: 4

Oleg Belousov
Oleg Belousov

Reputation: 10111

For me, the only thing that worked using adv on MacOs Yosemite, is setting the processor to ARM (native CPU of the device - standard 4" Nexus).

Upvotes: 1

Jerome Anthony
Jerome Anthony

Reputation: 8021

I had virtualbox running. Killing the VM allowed allowed the emulator to run.

Upvotes: 68

John Delaney
John Delaney

Reputation: 181

I had this problem. For me it was the HAXM version.

When you get a new version of HAMX through the SDK Manager, it tells you that it is installed. It is not. You must go to this folder:

<Android SDK>\extras\intel\Hardware_Accelerated_Execution_Manager\

and run intelhaxm-android.exe manually. In my case, I had 1.0.6 and upgraded to 1.1.

I think that what caused the error in the first place was that some other part of the SDK that I had updated needed 1.1.

Upvotes: 18

Daniel Wilson
Daniel Wilson

Reputation: 19824

I was trying to launch a Gingerbread 2.3.3 x86 emulator and it would not launch. Changing from x86 to arm made the problem go away.

Upvotes: 1

Paul Kane
Paul Kane

Reputation: 111

For those developers whose local environment leverages a VM (e.g. Homestead), simply halt the VM before launching the Android emulator. Restarting it after will allow both to run in parallel, but you're likely going to run into severe performance issues.

Upvotes: 0

raddevus
raddevus

Reputation: 9077

This kept failing until I changed it to [x] Use Host GPU as shown in pic.

AVD Set up

Upvotes: 3

marvatron
marvatron

Reputation: 331

It seems like in your environment variables on your system (for me on Window 7), setting the "Path" system variable (not user variable) to "sdk_install_location\tools\lib" e.g: "C:\Users\android_sdk\tools\lib" solved the problem for me.

Check out the "Tips and Tricks" section at this webpage: https://software.intel.com/en-us/android/articles/installation-instructions-for-intel-hardware-accelerated-execution-manager-windows for more info (if link is dead/doesn't work just google "Installation Instructions for Intel HAX").

Upvotes: 0

chovy
chovy

Reputation: 75774

I was on a mac and had this problem. I did not think I was running a VM (I have vbox but it isn't running). I restarted my computer and before starting any other apps I tried the emulator and it works fine.

Upvotes: 2

adubey
adubey

Reputation: 502

Ya, i had virtual box running and was getting this error, shutting it down fixed the error.

Upvotes: 2

thisrunson
thisrunson

Reputation: 11

I reduced the size of the VM memory allocated and it seems to have fixed it.

Upvotes: -1

LILkillaBEE
LILkillaBEE

Reputation: 168

For me it was google appengine running locally.

Upvotes: 0

Larynx
Larynx

Reputation: 408

Finally, I found the anwer for this question. I had exactly the same problem and it was completely solved.

Virtual device or webcam is rarely the cause of your problem.

Just install mainboard chipset driver.

I recommend you to use 3DP chipset autoinstaller.

Good luck!

Upvotes: 0

Jorge E. Hern&#225;ndez
Jorge E. Hern&#225;ndez

Reputation: 2938

I had the Windows Virtual PC running (on Windows of course). Once I turned off, the emulator went fine.

Hope this helps.

Upvotes: 1

user3016205
user3016205

Reputation: 21

Make sure you don't have any virtual machines running. In my case, I had genymotion running which was causing this error. when i kill genymotion's Process and kill all Oracle VM VirtualBox related process then it work by wangshiming don't thankyou me

Upvotes: 2

Scott Petrack
Scott Petrack

Reputation: 227

"vcpu reg" are "Virtual CPU REGisters" that exist on many processors that have things like multiple cores, hyperthreading, or other features that enable higher layers to believe that there is more than one CPU present when there isn't -- such as today's x86s. No reason to go in to detail -- you can imagine that getting a coherent, single "virtual CPU context" is necessary for the kind of hardware virtualization that HAX offers.

Normally, it's not a problem to run multiple virtual machines of various sorts simultaneously. But if one of them crashes, or misbehaves, or just decides to be a hog, HAX might find that it just can't put together a coherent virtual machine, because it can't sync a virtual CPU context for itself. It'd be like trying to run a real machine with no CPU.

Bottom line is open task manager and kill things that you don't need and that look like they might be holding virtual machine resources. In the worst case, a reboot is almost certain to fix the problem.

Upvotes: 10

user2820159
user2820159

Reputation: 11

I think it must be a variety of reasons cause this failure. In my case, since I installed the Google input method software, "Failed to sync vcpu reg" appeared. This was the one and only change before normal working. So, after uninstall the Google Input software, it was recovered.just a little reference, although I can't believe this solution for long time either.

Upvotes: 1

Related Questions