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  1. Qt
  2. QTBUG-72785

[regression] Freezes cursor - applications lag

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: P1: Critical
    • Resolution: Done
    • Affects Version/s: 5.12.0
    • Fix Version/s: 5.12.2, 5.14.0 Alpha
    • Component/s: QPA: X11/XCB
    • Labels:
      None
    • Environment:
      Arch Linux

      Qt: 5.12.0-1 (qt qt5)
      Szkielety KDE: 5.53.0
      kf5-config: 1.0
    • Platform/s:
      Linux/X11
    • Commits:
      d8d2025f06d653b4402651576ede94cf35710d77 (qt/qtbase/5.12)

      Description

      My cursor freezes. I can not use the Telegram ver. 1.5.4. I can not move windows between monitors. In Dolphin, I can not add "drag and drop" tabs to my Places.

      My /var/log/Xorg.0.log

      ...
      [ 73384.721] (II) event23 - A4TECH USB Device: SYN_DROPPED event - some input events have been lost.
      [ 73386.861] (II) event23 - A4TECH USB Device: SYN_DROPPED event - some input events have been lost.
      [ 73387.487] (II) event23 - A4TECH USB Device: SYN_DROPPED event - some input events have been lost.
      [ 73388.080] (II) event23 - A4TECH USB Device: SYN_DROPPED event - some input events have been lost.
      [ 73389.877] (II) event23 - A4TECH USB Device: SYN_DROPPED event - some input events have been lost.
      [ 73389.877] (II) event23 - A4TECH USB Device: WARNING: log rate limit exceeded (5 msgs per 30000ms). Discarding future messages.
      [ 73398.278] (EE) client bug: timer event23 debounce: offset negative (-15ms)
      [ 73398.278] (EE) client bug: timer event23 debounce short: offset negative (-28ms)
      ...
      

      Regression introduced by: https://codereview.qt-project.org/#/c/226142/
       

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              Assignee:
              allan.jensen Allan Sandfeld Jensen
              Reporter:
              thommen Tomasz Root
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                Dates

                Created:
                Updated:
                Resolved:

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