Android Studio sound problems on Kubuntu

Mucis palyers glitch when Android Studio emulator is running.

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pactl list short clients

cd ~/.android/avd

nano Medium_Phone_API_30.ini

avd.ini.encoding=UTF-8

path=/home/user/.android/avd/Medium_Phone_API_30.avd

path.rel=avd/Medium_Phone_API_30.avd

target=android-30

hw.audioInput = no

hw.audioOutput = no

audio.backend=none

Turning audio off NOT WORKING!!!

Before starting Android Studio:

export QEMU_AUDIO_DRV=none

Turning audio off NOT WORKING!!!

~/.android/avd$ emulator -avd Medium_Phone_API_30 -no-audio

Command 'emulator' not found, but can be installed with:

sudo apt install google-android-emulator-installer

emulator -avd Medium_Phone_API_30 -no-audio

PANIC: Cannot find AVD system path. Please define ANDROID_SDK_ROOT

Add to ~/.bashrc:

export ANDROID_HOME=$HOME/Android/Sdk

export ANDROID_HOME=$ANDROID_SDK_ROOT

export PATH=$PATH:$ANDROID_SDK_ROOT/emulator:$ANDROID_SDK_ROOT/platform-tools

Reload: source ~/.bashrc

emulator -avd Medium_Phone_API_30 -no-audio -verbose

Turning audio off WORKS!!!

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MobSF VM cannot be used for Dynamic Analysis

[INFO] 05/Feb/2026 09:25:06 - Performing System check

[INFO] 05/Feb/2026 09:25:06 - Android API Level identified as 30

[ERROR] 05/Feb/2026 09:25:06 - VM's /system is not writable. This VM cannot be used for Dynamic Analysis.

[ERROR] 05/Feb/2026 09:25:06 - Please start the AVD as per MobSF documentation!

[ERROR] 05/Feb/2026 09:25:06 - Cannot Connect to emulator-5554

[ERROR] 05/Feb/2026 09:25:06 - Internal Server Error: /android_dynamic/a312049526219c769f2fe0d599fc4bc8

[ERROR] 05/Feb/2026 09:25:06 - Internal Server Error: /android_dynamic/a312049526219c769f2fe0d599fc4bc8

adb root

adbd cannot run as root in production builds

Android Studio > Tools > Device Manager > Create Virtual Device > Medium Phone > API 29 > Services > Android Open Source

[INFO] 05/Feb/2026 10:56:33 - Testing Environment is Ready!

adb shell

su

https://stackoverflow.com/questions/43923996/adb-root-is-not-working-on-emulator-cannot-run-as-root-in-production-builds/45668555#45668555

https://xdaforums.com/t/question-how-to-get-writable-system-on-emulator-with-google-apps-android-13-arm-image.4567963/

You should use the open source version of Partition and run AVD with the following code:

emulator -avd <NameAVD> -writable-system

sudo apt install google-android-emulator-installer

Add to ~/.bashrc:

export ANDROID_HOME=$HOME/Android/Sdk

export ANDROID_HOME=$ANDROID_SDK_ROOT

export PATH=$PATH:$ANDROID_SDK_ROOT/emulator:$ANDROID_SDK_ROOT/platform-tools

Reload:

source ~/.bashrc

emulator -avd Medium_Phone_API_29 -writable-system -verbose

emulator -avd Medium_Phone_API_29 -writable-system -no-audio -verbose

git patch automatic code replacement in repository

git show commitID -- folder/ >> 001commitID.patch

cd to fresh git repo without changes and

git apply 001commitID.patch

GitHub hide and change mail in project repository files

git config --global user.name "USER"

git config --global user.email "123456789+USER@users.noreply.github.com"

git config --global --list

git config --local --list

Make sure working tree is clean:

git status

git add .

git commit -m "commit comment"

git filter-branch --env-filter '

export GIT_AUTHOR_EMAIL="123456789+USER@users.noreply.github.com"

export GIT_COMMITTER_EMAIL="123456789+USER@users.noreply.github.com"

' -- --all

rm -rf .git/refs/original

git reflog expire --expire=now --all

git gc --prune=now --aggressive

git log --reverse --format="%h %an <%ae>"

If you see:

yourname@users.noreply.github.com

git filter-branch --env-filter '

export GIT_AUTHOR_EMAIL="1123456789+USER@users.noreply.github.com"

export GIT_COMMITTER_EMAIL="123456789+USER@users.noreply.github.com"

' -- --all

git log

⚠️ This replaces the online repo history:

git push --force --all

git push --force --tags

git log

git log --all --author="yourname"

git for-each-ref --format="%(refname)" refs/original/ | xargs -n 1 git update-ref -d

git stash clear

git reflog expire --expire=now --all

git gc --prune=now --aggressive

What others must do (if anyone cloned). They must reclone, or:

git fetch --all

git reset --hard origin/main

git log --all --author="yourname"

SHOULD SHOW NOTHING

Root access for Android 4.4 injecting su

lsusb

sudo apt install android-tools-adb

adb devices

adb pull / /$HOME/Videos

adb shell

Configure Android 5.1 features with root access

Permanent USB Debugging

echo "mtp,adb" > /data/property/persist.sys.usb.config

chmod 644 /data/property/persist.sys.usb.config

echo "1" > /data/property/persist.service.adb.enable

chmod 644 /data/property/persist.service.adb.enable

reboot

MagiskHidePropsConf useless

acc useless

adb shell "magisk --remove-modules" // OR rm -rf /data/adb/modules/*

reboot

Launch Magisk > Settings > Superuser > Enable Tapjacking > Allow for ADB

adb shell su -c "settings put global development_settings_enabled 1"

adb shell su -c "settings put global adb_enabled 1"

Disabling Google Play Services

pm disable-user --user 0 com.google.android.gms

Package com.google.android.gms new state: disabled-user

pm disable-user --user 0 com.android.vending

Package com.android.vending new state: disabled-user

To re-enable:

adb shell su

pm enable com.google.android.gms

pm enable com.android.vending

Do NOT delete APK unless you know what you’re doing.

Root access for Android 5.1 with Magisk 22.1-22100

Install Magisk on phone, copy boot.img

Launch Magisk > Install > Select boot.img

DO NOT TICK AVB 2.0 for Android 5.1

adb pull storage/sdcard0/download/magisk_patched.img /home/user/Downloads

BACKUP YOUR DATA!!!

adb reboot bootloader

fastboot devices -l

0123456789ABCDEF       fastboot

usb:5-1

fastboot getvar unlocked

unlocked: no

Finished. Total time: 0.002s

sudo fastboot oem unlock

Press Volume Up on phone (READ MESSAGE!!!)

Shows ==> Fastboot... No need to do anything.

sudo fastboot devices

[sudo] password for user:

0123456789ABCDEF         fastboot

cd ~/Donwloads

ls

sudo fastboot flash boot magisk_patched.img

Sending 'boot' (16384 KB)                          OKAY [  0.464s]

Writing 'boot'                                     OKAY [  2.210s]

Finished. Total time: 2.689s

sudo fastboot reboot

DO EVERYTHING AT YOUR OWN RISK!