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  1. Qt
  2. QTBUG-70760

QT 5.11.2 causes stutter opening Applications on Linux

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P2: Important
    • Resolution: Done
    • Affects Version/s: 5.11.2
    • Fix Version/s: 5.11.3, 5.12.0 Beta 4
    • Component/s: QPA: X11/XCB
    • Labels:
      None
    • Platform/s:
      Linux/X11
    • Commits:
      d4e937a6280f34bc1cce8c8cea3806a741312fbc (qt/qtbase/5.11)

      Description

      SUMMARY:
      When opening nearly all applications, but mainly seen with Dolphin, there is a noticeable 0.5s stutter where the entire system (mouse included) freezes. The animation of the window opening is then laggy (loss of FPS) whilst the application opens. Opening another instance of the same app then causes no issues, and the issue seems quite random (sometimes it's noticable, other times it's not.

      STEPS TO REPRODUCE
      1. Open Dolphin from Pinned Task in Task Manager, or via Baloo / Menu

      OBSERVED RESULT
      Micro stutter whilst the application loads

      EXPECTED RESULT
      Seamless and smooth open of application without stutter

      SOFTWARE VERSIONS
      KDE Plasma Version: 5.13.5
      KDE Frameworks Version: 5.50.0
      Qt Version: 5.11.2

      ADDITIONAL INFORMATION
      Intel HD Graphics 640 on Intel Corei5 7200U Processor. MODSET Drivers are worse, xf86-video-intel mitigates the issue somewhat.
      Tested on Archlinux and Manjaro. Issue is present on both systems running the same versions listed above. Seems that this issue only occurred for me after the 5.13.5 update roughly 3 days ago.

       

      Edit: this seems to also affect Manjaro as well as Arch / Antetgos, both on 5.11.2 of QT. Downgrading to 5.11.1 fixes the issue but may have other unforseen issues. The above was reported to KDE first before it was identified to affect more than just KDE.

      KDE Developers asked for this to be opened.

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          For Gerrit Dashboard: QTBUG-70760
          # Subject Branch Project Status CR V

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              Assignee:
              paeglis Gatis Paeglis
              Reporter:
              magentium Chris Raven
              Votes:
              1 Vote for this issue
              Watchers:
              10 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved:

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