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Questions tagged [system]

For questions about the internal procedures and processes of the Android system.

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Patch ROM for comatiblity

I has an custom ROM that supports only kenzo (Xiaomi Redmi Note 3 Pro) device, but how I can patch this ROM for compatiblity to any otheer device? I tried to flash stock aboot, boot, cmnlib, sbl1, ...
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100% Flash memory used by system/proc folder - Oppo find X3 lite - colorOS 12

I'm currently facing this issue: after the ColorOS 12 update on my OPPO find X3 lite, my phone was showing the warning of flash memory full (128 GB). Even removing files, cache, apps and other stuff, ...
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How do I prevent overwriting of sysctl variables?

Android 10. Trying to disable ipv6 (yes, I know the second line below appears redundant). echo 1 > /proc/sys/net/ipv6/conf/all/disable_ipv6 echo 1 > /proc/sys/net/ipv6/conf/wlan0/disable_ipv6 ...
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Changed /system permissions, now corrupt

I own a Galaxy S5 and recently rooted it using SuperSU/TWRP. I was trying to set the /system partition to read-write, but instead, I accidentally set the permissions of the /system folder to R W for ...
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Change network interface name in persistent way on Android [duplicate]

Is it possible to change the name of a network interface in an Android 11 rooted system making the change persistent? I am not looking for just renaming the interface after the boot, I want to change ...
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How can I see a log of system changes that have been made to my phone?

Recently my phone suddenly exhibited weird behavior which I remedied by running com.google.android.setupwizard/.SetupWizardTestActivity. You can see the exact problem and solution here. Everything ...
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Unnecessary system popups

I recently bought samsung s20 fe 5g and unnecessary pops ups giving me headache and I can't even disable it .i am sending some of the examples .please help me It's definitely a samsung Ui 4.0
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How to load android shared libraries

How does Android load /system/lib/*.so libraries? How does the system knows what file is for what purpose. Is there a database or list of expected.so files and their functions?
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Disabling dm-verity using 9008(edl) mode?

My device blocks fastboot flash command, so I can only flash images using QFIL under 9008(edl) mode. By enabling OEM Unlock in dev settings, Magisk-patched boot image works well. However, when I flash ...
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When is the Final vbmeta Image Generated in a Signed Build?

BACKGROUND I am attempting to generate my own signed builds of LineageOS 18.1 and am having trouble with the final signed OTA. Specifically, the vendor partition is failing during AVB verification ...
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509 views

Getting "java.lang.SecurityException: Shell does not have permission to access user 150" when uninstalling apps from Samsung Secure folder using ADB

I am using Samsung Galaxy A50, Android 11, One UI 3.1. I use Samsung Secure folder. There are many bloatware in it and I could not find a way to uninstall (and disable) them via ADB. Owner profile ...
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Is there a way to stop Android messages from network providers?

I receive ads from my network provider via Android pop-ups: Is there a way to disable it? These messages are extremely annoying, I woke up last night due to the brightness of the screen, as these ...
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1 answer
698 views

Android system/bin/sh

I erased a file called .sh from the system/bin directory on my android jellbean device now it doesn't work properly. I can connect via USB and adb but cannot access the shell. How can I replace the ...
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101 views

Replace EMUI systemui with stock

My phone broke just a bit too early. I am currently waiting for a Fairphone 4, but the delivery time is quite long, so I am stuck with an old Honor 9 Lite which we had lying around. But EMUI is really ...
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Extracting ROM from android phone, how does flashing work?

For a project, I need to get the ROM of a specific android device. I cannot find it online(obscure manufacturer, makes mostly PDA's), so I have to extract it myself. I've seen ways of doing this using ...
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How do I set software button actions

I modifying a rom. I downloaded the android 11 gsi straight from Google. After replacing the default launcher with Microsoft launcher and adding a bunch of file in /system_root/system/etc/ I can no ...
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How to disable camera and microphone completely from operative system?

Is there a procedure to disable camera and microphone completely from the operative system, and make these hardware features unavailable to any app or process ? It can be useful for privacy reasons or ...
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2 votes
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Cannot bind to Cell Network Interface example with curl

I am trying to use the Mobile Network interface rmnet_data0 while Wi-Fi wlan0 is enabled. You can read my progress with the developer JsBergbau of BindToInterface at this link https://github.com/...
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Steps to investigate what is happening to system files

So, I recently got a notification that space was running out on my 128GB phone. Looking at the segmentation then, the system files was taking about 45 GB data while my other stuff was taking around ...
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2 votes
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Check for the existence of files without root privileges

How do apps check for the existence of files and folders on /data and /system partitions without having root privileges? I know some games and apps do this for anticheat and security reasons.
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Are there any ports opened on an Android device by default?

Title says it all. Looking at a Samsung S10 phone and would like to know if there are any ports opened on device by default?
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Apply system wide screen rotation

I've recently replaced a screen on my phone and it displays images slightly rotated. It's just a couple of pixels but it's really annoying. I was wondering if there was some setting or API method to ...
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logcat: E QC-QMI : qmi_client [378]: unable to connect to server, errno=[13:Permission denied]

On my Fairphone-2 with Android 9 I had a look into logcat because it is generally unstable since the upgrade to 9 and sometimes gets hot and drains battery like hell. Today I saw this: 378 395 E QC-...
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How factory reset process looks in details?

So I tried to find answer for this question, but it is very hard to find something other than simple instruction of doing factory reset and backuping data. I'm interested of detailed process of the ...
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not a changeable permission type

There are some android permissions that cannot be granted/revoked through pm (even with root shell). The error message is usually Permission android.permission.XXXX is not a changeable permission type ...
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Why would Android list some files that are not accessible (I/O error)?

For background, trying to resolve a problem with a Android 4.x tablet Denver TAC-97032 (Tablet battery replacement and alloc_device_open fail?). The device cannot boot fully, but I can connect to it ...
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Why is impossible to remove system apps and preinstalled apps like 'Facebook' (with Android OS & without rooting) and can they be suppressed?

What is the explanation offered by manufacturers and vendors for why this is the case? Have there been legal challenges to this practice? For instance, I can't remove the apps 'Facebook' (not OS-...
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1 vote
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285 views

How to write to an Android system file?

Why is writing to /sys/class/power_supply/battery/status having no effect? Accessed manually via adb shell as root, eg echo "Discharging" > /sys/class/power_supply/battery/status does not ...
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2 votes
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301 views

Resize /system partition on Galaxy note 3 SM-N9005

I am trying to resize the partition /system using the parted and gdisk commands. But none of these commands succeed in changing mmcblk0 partitions after execution. The things I do are as follows: ...
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3 votes
1 answer
10k views

How to get Android 11 to trust a user root CA without a private key?

I'm trying to install a new user root CA certificate in DER form (.crt file) on Android 11, without much success. The previous (expired) CA certificate worked just fine from an earlier install on a ...
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Cant delete system files on rooted phone [duplicate]

I'm using zarchiver as a file managing app on my rooted phone... I cant delete some specific app folders in /system/app even though I remounted it as rewritable.... in rewritable it will ...
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178 views

How to expand system partition? [Xiaomi Mi 9]

How to expand system partition? I'd need at least ~600MB more for OpenGapps package I'd like. Many thanks in advance! Here's log from parted cepheus:/ # parted /dev/block/sde GNU Parted 3.2 Using /dev/...
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screenrecording and screenshot detector

Is there a way or an app or anything to detect whether the other person is screen recording or screenshotting their screen while engaging with you with either mobile or PC?
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5 votes
1 answer
1k views

Why is the FrameBuffer missing on some Android devices?

I'm curious about the display device on Android. I know that on Linux, device devices are represented as /dev/fbX, which "fb" stands for FrameBuffer. I also heard that Android uses ...
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2 votes
3 answers
1k views

How to cancel an announced Android System update

I wrongly click the button to book a update for Android System. How can I cancel it before Nov 22 after 02:00
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HTC u11 didn't any reaction to press button ony to see the computer the com port and phone flash

I'm bought the HTC u11 is the dead OS. The other owner did something with the system. The phone is see the computer the com port and the phone flashing Red lights. I'm try to charging battery but didn'...
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5 votes
1 answer
482 views

What is the official name of the "open apps" view that is navigated to by hitting the square system button?

On Android, there are three buttons along the bottom system bar. When I hit the square one, a UI displaying all the currently "open" apps. What is the official name of this view?
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2 votes
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remount, turn off SElinux, all fails even though I am root

I have a device which is never hacked into before, mostly as nobody has it, it is a android tv box. I have temp root using the dirty cow exploit, and tried to remount system using the mount command. ...
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1 vote
1 answer
694 views

Documentation of /system/addon.d

Placing scripts into /system/addon.d/ makes them execute before and after every OTA packag upgrade. This is used or mentioned in multiple places. I have multiple questions about this: Is this a ...
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4 votes
2 answers
1k views

How can an Android user know which Project Mainline modules their device supports?

Project Mainline (officially "Modular System Components" - https://source.android.com/devices/architecture/modular-system) introduced a set of OS components that Google can update via Google ...
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1 answer
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Can I slow down the speed of my recorded phone calls?

I've installed the Call Recorder app on my GT-S6810P Samsung Galaxy phone. The app has successfully recorded all of my calls but when I play them back it plays them too fast. Is there any way I can ...
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What android apps are these? [duplicate]

I currently use a TCL A1 (A501DL) running Android Version 8.1.0. I went to check my Wi-Fi data usage. I scrolled down and seen all these apps! There are 9 of them. I've never seen them before and when ...
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1 vote
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1k views

How to flash /system using twrp when system.img is 1.7GB and internal storage has 1.5GB max limit

I happen to have an old phone laying around with messed up system partition(a couple of files accidentally deleted). This phone has an internal storage of max 1.5 GB(total 4gb, after setting ...
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3 votes
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62 views

True full backup of android including profiles

Referring to this tread as an example:How to make a full backup and restore (including ROM) using Windows PC via USB? I would like to make a full backup, This means everything. Apps files profiles ...
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1 vote
0 answers
247 views

Troubleshooting Device Policy Manager library failure on Android 9

Running MIUI 11 EU ROM/Redmi Note 7 (x86, x64,arm). Logcat: 08-09 02:07:13.089 20371 20371 F linker : CANNOT LINK EXECUTABLE "/system/bin/dpmd": "/system/lib64/libdpmframework.so" ...
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How to find the creation date and time (aka timestamp) for a file or folder in Android?

In Android, it is simple to view the modified date and for any file or folder. Just about any decent file manager (such as Solid Explorer) includes this functionality. But how do you view the ...
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1 vote
1 answer
1k views

How can I see the history log of system updates

I need to know the history log of system updates "ROM / OTA updates", is there any file on the device can I know this information?
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"System" is trying to access Internet

I am using OnePlus 3T, Android 9. Recently I installed an app called "NoRoot Firewall" to prevent the apps from accessing the internet. I explicitly allowed and denied access to internet for some apps ...
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1 vote
1 answer
172 views

Is it Possible to Create an Operating System for Android Devices?

Is it possible to run an operating system other than Android on Android devices? I know that the bootloader is hard-coded into the firmware and even if you tried you can't change what it does but what ...
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3 votes
0 answers
144 views

Replacing Malware System Apps with Clean Versions of Apps

I have many times found devices or ROMs that have malware installed as system apps. This thread is intended to define a recurring problem and discuss and determine solutions. Background: In many ...
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