[flutter_tools] allow filtering of adb logcat by "flutter" to be configured from CLI args #120711

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1. darshankawar

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   in triagePresently being triaged by the triage teamPresently being triaged by the triage team

   c: new featureNothing broken; request for a new capabilityNothing broken; request for a new capability

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

   c: proposalA detailed proposal for a change to FlutterA detailed proposal for a change to Flutter

   and removed

   in triagePresently being triaged by the triage teamPresently being triaged by the triage team

   on Feb 15, 2023
2. DanTup commented on Feb 15, 2023

   

   DanTup

   on Feb 15, 2023

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   If the volume of traffic is high, there may be value in allowing it to be stopped/started while the app is running (via a message to the flutter run daemon, or over the a VM Service extension).

   This could allow the user to start the log, perform some action in the app, then stop the log, rather than having to wade through large amounts of logging.
3. lukehutch commented on Mar 14, 2023

   

   lukehutch

   on Mar 14, 2023

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   Some logcat lines don't contain the string flutter (unless that part of the line has already been suppressed):

   D/EGL_emulation( 4571): app_time_stats: avg=39.67ms min=0.97ms max=650.57ms count=26
   

   This debug line in particular really pollutes the log.

   The prefix gives the log level: D/ is debug, W/ is warning, E/ is error. So in addition to the proposal of enabling or disabling the filter for logcat lines containing flutter, I suggest also allowing the user to set a minimum loglevel.

   👍React with 👍4Reacted by Sam Deane, Azad, codenyte and Joe Muller
4. flutter-triage-bot

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   team-toolOwned by Flutter Tool teamOwned by Flutter Tool team

   on Jul 8, 2023
5. christopherfujino

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

   triaged-toolTriaged by Flutter Tool teamTriaged by Flutter Tool team

   on Jul 17, 2023
6. LoveriusB commented on Aug 10, 2023

   

   LoveriusB

   on Aug 10, 2023 · Hidden as off-topic

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7. matanlurey commented on Oct 10, 2024

   

   matanlurey

   on Oct 10, 2024

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   Fwiw, I looked into this briefly today.

   ADB logcat logs are very verbose, so we filter it by lines that contain the pattern 'flutter'.

   ... is not totally true - there are two branches:

   • Current app process (i.e. your flutter app): virtually no filtering
   • Another process (i.e. another app, possibly Flutter): filtering based on things like flutter

   The vast majority of so-called log-spam (e.g. D/EGL_emulation) are in the current process ID, meaning its not filtered.

   I am very supportive to adding much more liberal adb logcat filtering, similar to what we did in the engine:

   https://github.com/flutter/engine/blob/main/testing/scenario_app/bin/utils/adb_logcat_filtering.dart

   ... however that is a potentially larger change. If the tool team is supportive of more aggressive Android filtering, I'd be happy to contribute here; removing triaged-tool to get an opinion before moving forward.
8. matanlurey

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   on Oct 10, 2024
9. bkonyi commented on Oct 15, 2024

   

   bkonyi

   on Oct 15, 2024

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   I'm all for reducing log spam but I don't have enough context to know whether or not it's safe to filter more aggressively. Is there a situation where we wouldn't want these logs filtered? Maybe @reidbaker will have a stronger opinion on this.
10. bkonyi

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12. reidbaker

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    on Oct 17, 2024
13. flutter-triage-bot

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16. gmackall

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17. mboetger

    added 2 commits that reference this issue on May 13, 2026

    Resolve issue flutter#120711: Add --[no-]adb-log-filtering flag to by…

    ...

    e3d6ca7

    Resolve issue flutter#120711: Add --[no-]adb-log-filtering flag to by…

    ...

    7adcc50
18. auto-submit

    closed this as completedin #187252on Aug 27, 2026
19. pull

    added a commit that references this issue on Aug 27, 2026

    Support --[no-]adb-log-filtering CLI option (flutter#187252)

    ...

    This issue will close once commit 477ca01 is merged into the 'master' branch.

    477ca01
20. github-actions commented on Sep 10, 2026

    

    github-actionsBot

    on Sep 10, 2026 – with GitHub Actions

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    This thread has been automatically locked since there has not been any recent activity after it was closed. If you are still experiencing a similar issue, please open a new bug, including the output of flutter doctor -v and a minimal reproduction of the issue.
21. github-actions

    locked as resolved and limited conversation to collaborators on Sep 10, 2026