"flutter logs" do not show logs on iOS 13+ physical device #44199

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1. jmagman

   added

   platform-iosiOS applications specificallyiOS applications specifically

   toolAffects the "flutter" command-line tool. See also t: labels.Affects the "flutter" command-line tool. See also t: labels.

   on Nov 5, 2019
2. zanderso

   added

   c: regressionIt was better in the past than it is nowIt was better in the past than it is now

   on Nov 5, 2019
3. jmagman commented on Nov 5, 2019

   

   jmagman

   on Nov 5, 2019

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   There's no (publicly exposed) way to get live unified logs off a device from the host's command line. May need to connect to the VM service.
4. zanderso commented on Nov 5, 2019

   

   zanderso

   on Nov 5, 2019

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   The 'logs' command is not used very often. We should consider fixing this issue by removing it.
5. zanderso

   assigned

   jmagman

   on Nov 12, 2019
6. zanderso commented on Nov 12, 2019

   

   zanderso

   on Nov 12, 2019

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   Let's add a printError() at the top of the log command indicating that the command will be removed in the next stable.
7. Hixie commented on Nov 16, 2019

   

   Hixie

   on Nov 16, 2019

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   I'd rather we didn't deprecate this. I use it all the time on Android. I understand that it might not work on iOS, but it should be fine for it to continue working on other platforms. It's convenient because it filters down to flutter logs only, unlike adb logcat, and we can make it cleverer (e.g. automatically symbolicating stack traces in crashes).

   👍React with 👍1Reacted by TheJulianJES
8. jmagman

   changed the title [-]flutter logs do not show logs on iOS 13+ physical device[/-] [+]"flutter logs" do not show logs on iOS 13+ physical device[/+] on Jan 15, 2020
9. jmagman

   added

   P2Important issues not at the top of the work listImportant issues not at the top of the work list

   on Aug 11, 2020
10. dnfield commented on Jun 4, 2021

    

    dnfield

    on Jun 4, 2021

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    See #84000 for some more discussion.

    This appears to work again on iOS 14 devices. @jmagman is this as simple as just removing

    flutter/packages/flutter_tools/lib/src/ios/devices.dart

    Lines 730 to 733 in 0acf53e

    	// syslog is not written on iOS 13+.
    	if (_majorSdkVersion >= minimumUniversalLoggingSdkVersion) {
    	return;
    	}

    and updating tests?
11. jmagman commented on Jun 4, 2021

    

    jmagman

    on Jun 4, 2021

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    See #84000 for some more discussion.

    This appears to work again on iOS 14 devices. @jmagman is this as simple as just removing

    flutter/packages/flutter_tools/lib/src/ios/devices.dart

    Lines 730 to 733 in 0acf53e

    	// syslog is not written on iOS 13+.
    	if (_majorSdkVersion >= minimumUniversalLoggingSdkVersion) {
    	return;
    	}

    and updating tests?

    I think just removing that would cause duplicate flutter run/drive logs since the logs are also being streamed from an lldb session.
12. dnfield commented on Jun 4, 2021

    

    dnfield

    on Jun 4, 2021

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    I'll try to experiment.
13. jmagman

    removed their assignment

    on Apr 21, 2023
14. eseidel commented on May 18, 2023

    

    eseidel

    on May 18, 2023

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    I'm not sure if this is the right issue to discuss this, but I'm also not seeing flutter run logs on iOS. I do see logs when I open up XCode. It looks like #66399 attempted to fix this a couple years ago. Not sure the current status. I'm using

    eseidel@erics-mbp src % flutter --version                                                                      
    Flutter 3.10.1 • channel stable • https://github.com/flutter/flutter.git
    Framework • revision d3d8effc68 (2 days ago) • 2023-05-16 17:59:05 -0700
    Engine • revision b4fb11214d
    Tools • Dart 3.0.1 • DevTools 2.23.1
    

    iPhone in Pocket (mobile) • 00008120-0011315A2290C01E • ios            • iOS 16.4.1 20E252
    
15. eseidel commented on May 18, 2023

    

    eseidel

    on May 18, 2023

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    I mostly wanted logs (flutter run logs would be fine) for when I'm editing the engine and wish to log from the engine code. but I can use https://github.com/flutter/flutter/wiki/Debugging-the-engine#debugging-ios-builds-with-xcode for now if needed.
16. eseidel commented on May 18, 2023

    

    eseidel

    on May 18, 2023

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    Filed #127121
17. flutter-triage-bot

    added

    multiteam-retriage-candidate

    team-iosOwned by iOS platform teamOwned by iOS platform team

    triaged-iosTriaged by iOS platform teamTriaged by iOS platform team

    on Jul 8, 2023
18. jmagman

    added

    P3Issues that are less important to the Flutter projectIssues that are less important to the Flutter project

    and removed

    P2Important issues not at the top of the work listImportant issues not at the top of the work list

    on Feb 8, 2024
19. Hixie

    removed

    multiteam-retriage-candidate

    on Mar 6, 2024
20. matanlurey

    marked [iOS] print function not print the logs to the terminal when run with flutter run --release command with physical device #154657 as a duplicate of this issue on Jul 11, 2025