Visual Studio 2019 ver 16.8.1: Xamarin - Error starting Android Emulator

LP 111

Error:
WARNING: unexpected '-prop' value ('monodroid.avdname=pixel_2_q_10_0_-_api_29'), only 'qemu.' properties are supported
WARNING: unexpected '-prop' value ('emu.uuid=247e01dd-5fb3-47fe-92ec-b73d9583cfe3'), only 'qemu.' properties are supported

Description:
When I click on the Run button in the Android Device Manager - the error appears immediately

Note:
Before updating to version 16.8.0 and later to version 16.8.1 the android emulator worked correctly

System specifications:
OS: Windows 10 pro ver 2004 build 19041.630
Processor: Intel Core i7-8700K CPU 3.70GHz
Visual Studio: Enterprise 2019 ver 16.8.1
.NET Framework: ver 4.8.04084
Xamarin: ver 16.8.000.255
Xamarin.Android SDK: ver 11.1.0.17
Hyper-V: installed and Enabled
Windows Hypervisor Platform: Installed and Enabled

Thanks in advance

JarvanZhang 23,936 Reputation points

2020-11-23T10:13:01.387+00:00

This issue occurs for the new version VS and has not been fixed well. You could seed a feed back to the product team: Help -> Seed Feedback-> Report a problem. The 16.8.2 version is released now, try to update the VS and test again.
LP 111 Reputation points

2020-11-23T10:23:25.907+00:00

i downloaded the version 16.8.2 but the error still exists.
JarvanZhang 23,936 Reputation points

2020-11-24T07:48:23.337+00:00

Hi, I update the VS to the version 16.8.2 and doesn't face the isue when deploying a project. Try to reset the emulator: Android Device Manager ->Edit -> Factory Reset. Or create a new emulator and test.

Accepted answer

LP 111 Reputation points

2020-12-01T12:17:24.853+00:00

I have found the solution.
The problem was caused by the video card (AMD Radeon RX580) with outdated drivers.
Update the drivers with "AMD Adrenalin 2020 Edition" and reboot.
Run the android emulator and if you get a GPU error set hw.gpu.mode = off in the emulator properties.
With these steps I solved. I hope they are useful to you too.
Regards
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3 people found this answer helpful.
Daniel 1 Reputation point

2022-09-25T19:08:49.947+00:00

Same problem here.
error message below. I have tried all different combo of windows function, SKD manager and Android Emulators.
I got the AMD Ryzen 7 3700X 8-Core Processor and Nvidia Geforce GTX 1660 Ti grafics card.
I tried "hyper-v" in functions, "windows hypervisorplatform" and "platform for virtualcomputers".
I also made sure my drivers for AMD and the Nvidia is up to date. I got android 11.0 R, 9.0 etc SDK platforms in VS boxed, also under tools Android SDK Command-line tools, Android SKD platform-tools, Android SKD build Tools, extras and other boxed in. Im doing VS Version 16.11.19 and also tried the 2022 verson. Im pretty sure it wont let me use Android Emulator at this point. :/
edit; i also tried set hw.gpu.mode = off.

"Device error: WARNING | unexpected '-prop' value ('monodroid.avdname=pixel_2_pie_9_0_-_api_28'), only 'qemu.' properties are supported
WARNING | unexpected '-prop' value ('emu.uuid=459162d0-4f6e-4590-a378-eba5a74e3869'), only 'qemu.' properties are supported
ERROR | x86 emulation currently requires hardware acceleration!
CPU acceleration status: GVM is not installed on this machine
More info on configuring VM acceleration on Windows:
https://developer.android.com/studio/run/emulator-acceleration#vm-windows
General information on acceleration: https://developer.android.com/studio/run/emulator-acceleration.
"
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1 additional answer

Nikola Radosavljevic 1 Reputation point

2020-11-26T20:14:29.187+00:00

Happens to me as well. I have 16.8.2
Following installed:

One specificity is that I run it in Windows 10 Pro machine (with Hyper-V) which is hosted on a Windows 2019 server hypervisor with nested virtualization enabled.
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LP 111 Reputation points

2020-11-26T21:49:20.403+00:00

Hi Nikola i installed 16.8.2 too a few days ago but the error still exists

JarvanZhang 23,936 Reputation points

2020-11-27T05:35:56.477+00:00

Does it work after 'Factory Reset'? Add will this issue occur for all the emulators? Try to deploy the project in a physical device to check if it will work.

LP 111 Reputation points

2020-11-27T07:04:47.887+00:00

yes I tried both with factory reset and to delete and recreate the emulators but the error still exists. The error appears only with Android emulators but on physical devices it works. Furthermore, even running the emulator from device manager I have the error not only from debugging.

JarvanZhang 23,936 Reputation points

2020-11-27T08:53:43.987+00:00

Try to repair the IDE. If it still doesn't work, please test the project on the physical device first and report the issue to the VS product team.
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