If you are rooted you can download any logcat app or kernel aduitor has logcat features. Or you can use logcat flasher zip from this thread.Can anyone help me?
I used to install magisk, but for magisk hide I need logcat enabled.
Its disabled in the ROM I use (RR Pie on A5 2017).
How can I enable it?
If you are rooted you can download any logcat app or kernel aduitor has logcat features. Or you can use logcat flasher zip from this thread.
https://xdaforums.com/general/xda-university/universal-test-rom-build-didnt-boot-t3258818
Flash zip, reboot, then reboot to recovery & open terminal. Then type cd /proc/last_kmsg /sdcard/kernellog.txt
Then logcat will be in internal storage.
RR should have it in there settings, its enabled when you root. Probably should ask on the ROM thread, there isn't much action here now days.I dont need to save the logcat as a file, it just needs to be enabled.
Magisk hide only works with logcat enabled, and for me its disabled but I dont know how to re-enable
E BluetoothRemoteDevices: devicePropertyChangedCallback: bdDevice: 1C:52:16:88;D2:76, value is empty for type: 10
E bt_btif : btif_hf_upstreams_evt: Invalid index 26995
E BluetoothAvrcpController: Could not bind to Bluetooth AVRCP Controller Service with Intent { act=android.bluetooth.IBluetoothAvrcpController }
E BluetoothAvrcpController: Could not bind to Bluetooth AVRCP Controller Service with Intent { act=android.bluetooth.IBluetoothAvrcpController }
W bt_btif : BTHF: btif_hf_check_if_slc_connected: No SLC connection up
E BluetoothHeadsetServiceJni: Failed report phone state change, status: 2
W BluetoothAdapter: getBluetoothService() called with no BluetoothManagerCallback
E bt_btif : reset flags
E bt_rfcomm: PORT_DataInd, p_port:0xd7e1abdc, p_data_co_callback is null
E bt_rfcomm: PORT_DataInd, p_port:0xd7e1abdc, p_data_co_callback is null
E bt_rfcomm: PORT_DataInd, p_port:0xd7e1abdc, p_data_co_callback is null
E HeadsetStateMachine: processVendorSpecificAt: unsupported command: +XAPL=0000-0000-0100,7
E bt_rfcomm: PORT_DataInd, p_port:0xd7e1abdc, p_data_co_callback is null
E HeadsetStateMachine: processVendorSpecificAt: unsupported command: +IPHONEACCEV=2,1,7,2,0
E bt_rfcomm: PORT_DataInd, p_port:0xd7e1abdc, p_data_co_callback is null
E bt_rfcomm: PORT_DataInd, p_port:0xd7e1abdc, p_data_co_callback is null
E bt_btm : tBTM_SEC_DEV:0xd6d93008 rs_disc_pending=0
W bt_btif : bta_dm_check_av:0
W bt_btif : btif_dm_cback : unhandled event (14)
Does error or fatal error produce random reboots i am experiencing?
im new to this, can someone explain how to take kernel log after random reboot?
thanks ,according to your link soo the comand is cat/proc/last_kmsg, and to write the comand in terminal emulator sir?It matters what version android we're talking about. Stack Overflow link discusses a couple of different ways.
if you're running a newer version of Android/kernel that location has changed as mentioned further down the linked thread).thanks ,according to your link soo the comand is cat/proc/last_kmsg, and to write the comand in terminal emulator sir?
E/ Error - I would hope this is self explanatory
F/ Fatal Error - Again pretty self explanatory
I/ Information - This is pretty tricky, the information class shows what the system is doing, but it can also show you errors so read it carefully!
D/ Dalvikvm - This class will show what the dalvik processes are doing, but can also show you where mistakes are
W/ Warning - Warnings are basically errors, but less severe. Usually it will show you missing resources, conflicting or missing paths, etc...
V/ Verbose - Basically everything the phone is doing
S/ Silent - You will not see silent
[COLOR="Red"]D/dalvikvm( 1853): DexOpt: --- BEGIN 'core.jar' (bootstrap=1) ---[/COLOR]
Here we see that the dalvik process has begun to optimize our system files.
[COLOR="red"]D/dalvikvm( 2162): DexOpt: 'Lcom/sec/android/seccamera/SecCamera$OnMultiFrameShotEventListener;' has an earlier definition; blocking out[/COLOR]
Here you can see that the Dalvik process has already defined the called method, and is skipping the optimization
[COLOR="red"]I/PackageManager( 2130): /system/app/sCloudSyncBrowser.apk changed; collecting certs[/COLOR]
The information class is showing that there has been a change made to this apk, and is verifying the signature.
[COLOR="red"]W/ResourceType( 2130): Failure getting entry for 0x7f050020 (t=4 e=32) in package 0 (error -75)
D/PhoneStatusBar( 2792): Added status bar view
D/PhoneStatusBar( 2792): disable: < expand icons alerts ticker system_info back home recent clock >
W/PackageManager( 2130): Failure retrieving xml 0x7f050020 in package com.maxmpz.audioplayer
W/PackageManager( 2130): android.content.res.Resources$NotFoundException: Resource ID #0x7f050020
W/PackageManager( 2130): at android.content.res.Resources.getValue(Resources.java:1339)
W/PackageManager( 2130): at android.content.res.Resources.loadXmlResourceParser(Resources.java:2445)
W/PackageManager( 2130): at android.content.res.Resources.getXml(Resources.java:1227)
W/PackageManager( 2130): at android.app.ApplicationPackageManager.getXml(ApplicationPackageManager.java:1080)
W/PackageManager( 2130): at android.content.pm.PackageItemInfo.loadXmlMetaData(PackageItemInfo.java:227)
W/PackageManager( 2130): at com.android.server.AppWidgetServiceImpl.parseProviderInfoXml(AppWidgetServiceImpl.java:1264)
W/PackageManager( 2130): at com.android.server.AppWidgetServiceImpl.addProviderLocked(AppWidgetServiceImpl.java:1162)
W/PackageManager( 2130): at com.android.server.AppWidgetServiceImpl.loadAppWidgetList(AppWidgetServiceImpl.java:1148)
W/PackageManager( 2130): at com.android.server.AppWidgetServiceImpl.ensureStateLoadedLocked(AppWidgetServiceImpl.java:391)
W/PackageManager( 2130): at com.android.server.AppWidgetServiceImpl.systemReady(AppWidgetServiceImpl.java:211)
W/PackageManager( 2130): at com.android.server.AppWidgetService.systemReady(AppWidgetService.java:156)
W/PackageManager( 2130): at com.android.server.ServerThread$1.run(SystemServer.java:1882)
W/PackageManager( 2130): at com.android.server.am.ActivityManagerService.systemReady(ActivityManagerService.java:8250)
W/PackageManager( 2130): at com.android.server.am.ActivityManagerService$9$1.run(ActivityManagerService.java:8152)
W/PackageManager( 2130): at android.os.Handler.handleCallback(Handler.java:615)
W/PackageManager( 2130): at android.os.Handler.dispatchMessage(Handler.java:92)
W/PackageManager( 2130): at android.os.Looper.loop(Looper.java:137)
W/PackageManager( 2130): at com.android.server.am.ActivityManagerService$AThread.run(ActivityManagerService.java:1563)
W/ResourceType( 2130): Failure getting entry for 0x7f050021 (t=4 e=33) in package 0 (error -75)
W/PackageManager( 2130): Failure retrieving xml 0x7f050021 in package com.maxmpz.audioplayer
W/PackageManager( 2130): android.content.res.Resources$NotFoundException: Resource ID #0x7f050021
W/PackageManager( 2130): at android.content.res.Resources.getValue(Resources.java:1339)
W/PackageManager( 2130): at android.content.res.Resources.loadXmlResourceParser(Resources.java:2445)
W/PackageManager( 2130): at android.content.res.Resources.getXml(Resources.java:1227)
W/PackageManager( 2130): at android.app.ApplicationPackageManager.getXml(ApplicationPackageManager.java:1080)
W/PackageManager( 2130): at android.content.pm.PackageItemInfo.loadXmlMetaData(PackageItemInfo.java:227)
W/PackageManager( 2130): at com.android.server.AppWidgetServiceImpl.parseProviderInfoXml(AppWidgetServiceImpl.java:1264)
W/PackageManager( 2130): at com.android.server.AppWidgetServiceImpl.addProviderLocked(AppWidgetServiceImpl.java:1162)
W/PackageManager( 2130): at com.android.server.AppWidgetServiceImpl.loadAppWidgetList(AppWidgetServiceImpl.java:1148)
W/PackageManager( 2130): at com.android.server.AppWidgetServiceImpl.ensureStateLoadedLocked(AppWidgetServiceImpl.java:391)
W/PackageManager( 2130): at com.android.server.AppWidgetServiceImpl.systemReady(AppWidgetServiceImpl.java:211)
W/PackageManager( 2130): at com.android.server.AppWidgetService.systemReady(AppWidgetService.java:156)
W/PackageManager( 2130): at com.android.server.ServerThread$1.run(SystemServer.java:1882)
W/PackageManager( 2130): at com.android.server.am.ActivityManagerService.systemReady(ActivityManagerService.java:8250)
W/PackageManager( 2130): at com.android.server.am.ActivityManagerService$9$1.run(ActivityManagerService.java:8152)
W/PackageManager( 2130): at android.os.Handler.handleCallback(Handler.java:615)
W/PackageManager( 2130): at android.os.Handler.dispatchMessage(Handler.java:92)
W/PackageManager( 2130): at android.os.Looper.loop(Looper.java:137)
W/PackageManager( 2130): at com.android.server.am.ActivityManagerService$AThread.run(ActivityManagerService.java:1563)[/COLOR]
Here is a great example of the warning class showing missing resources.
[COLOR="red"]I/dalvikvm( 1853): Could not find method android.app.IActivityManager.resizeArrangedWindow, referenced from method android.app.ActivityManager.resizeArrangedWindow
W/dalvikvm( 1853): VFY: unable to resolve interface method 3769: Landroid/app/IActivityManager;.resizeArrangedWindow (IILandroid/graphics/Rect;)Landroid/graphics/Rect;
D/dalvikvm( 1853): VFY: replacing opcode 0x72 at 0x0004[/COLOR]
A prime example of Information class showing an "error", these will usually be listed in information class if they don't have a great impact of the functionality of the device.
[COLOR="red"]F/PackageManager( 2014): Unable to backup package manager settings, current changes will be lost at reboot
E/DropBoxManagerService(2014): Can't write: system_server_wtf
E/DropBoxManagerService(2014): java.io.FileNotFoundException: /data/system/dropbox/drop21.tmp: open failed: EROFS (Read-only file system)
E/DropBoxManagerService(2014): at libcore.io.IoBridge.open(IoBridge.java:416)
E/DropBoxManagerService(2014): at java.io.FileOutputStream.(FileOutputStream.java:88)
E/DropBoxManagerService(2014): at java.io.FileOutputStream.(FileOutputStream.java:73)
E/DropBoxManagerService(2014): at com.android.server.DropBoxManagerService.add(DropBoxManagerService.java:208)
E/DropBoxManagerService(2014): at android.os.DropBoxManager.addText(DropBoxManager.java:272)
E/DropBoxManagerService(2014): at com.android.server.am.ActivityManagerService$13.run(ActivityManagerService.java:8281)
E/DropBoxManagerService(2014): at com.android.server.am.ActivityManagerService.addErrorToDropBox(ActivityManagerService.java:8288)
E/DropBoxManagerService(2014): at com.android.server.am.ActivityManagerService.handleApplicationWtf(ActivityManagerService.java:8099)
E/DropBoxManagerService(2014): at com.android.internal.os.RuntimeInit.wtf(RuntimeInit.java:329)
E/DropBoxManagerService(2014): at android.util.Log$1.onTerribleFailure(Log.java:103)
E/DropBoxManagerService(2014): at android.util.Log.wtf(Log.java:278)
E/DropBoxManagerService(2014): at android.util.Log.wtf(Log.java:255)
E/DropBoxManagerService(2014): at com.android.server.pm.Settings.writeLPr(Settings.java:1115)
E/DropBoxManagerService(2014): at com.android.server.pm.PackageManagerService.unloadMediaPackages(PackageManagerService.java:9314)
E/DropBoxManagerService(2014): at com.android.server.pm.PackageManagerService.updateExternalMediaStatusInner(PackageManagerService.java:9128)
E/DropBoxManagerService(2014): at com.android.server.pm.PackageManagerService.access$3800(PackageManagerService.java:165)
E/DropBoxManagerService(2014): at com.android.server.pm.PackageManagerService$10.run(PackageManagerService.java:9017)
E/DropBoxManagerService(2014): at android.os.Handler.handleCallback(Handler.java:615)
E/DropBoxManagerService(2014): at android.os.Handler.dispatchMessage(Handler.java:92)
E/DropBoxManagerService(2014): at android.os.Looper.loop(Looper.java:137)
E/DropBoxManagerService(2014): at android.os.HandlerThread.run(HandlerThread.java:60)
E/DropBoxManagerService(2014): Caused by: libcore.io.ErrnoException: open failed: EROFS (Read-only file system)
E/DropBoxManagerService(2014): at libcore.io.Posix.open(Native Method)
E/DropBoxManagerService(2014): at libcore.io.BlockGuardOs.open(BlockGuardOs.java:110)
E/DropBoxManagerService(2014): at libcore.io.IoBridge.open(IoBridge.java:400)
E/DropBoxManagerService(2014): ... 20 more[/COLOR]
Here we have the Fatal and Error classes.
E/DropBoxManagerService(2014): at com.android.server.am.ActivityManagerService.addErrorToDropBox(ActivityManagerService.java:8288)
So here we have the printed error from logcat, the format used is as follows
Class/Process/Location
[b]Important! The log WILL NOT tell you what apk or jar the error occurs in, this is the hardest part of debugging![/b]
In the above error we see
Class = E/
Process = DropBoxManagerService
Location = com.android.server.am.ActivityManagerService.addErrorToDropBox(ActivityManagerService.java:8288) (Folder directory.File Name. Method)
I know from all my digging that the specified path is in services.jar so once I have services.jar decompiled I'll follow the path laid out. (Decompile "apkname".odex for odexed roms and classes.dex for deodexed roms)
These paths will always be located in the smali folder! For example I open my classes.dex folder after decompiling and see a smali folder, I'll open that and then I have options. The . after every word is a folder directory ( same as / in your computer directory )
The specified path says com. so I'll open the com folder, next I'm directed to android, then server, then am folder.
Now I should see a bunch of files and possibly some folders, [b]if there is no folder name that matches the next directory it is a file![/b]
ActivityManagerService is a filename, so I'll open that file using NotePad++ and search for the specified method which is addErrorToDropBox.
From here I can use another file to compare the lines to find my error, or I can know exactly where the error occured and report my problem to a helpful dev or member.
adb logcat ActivityManager:I MyApp:D *:S