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Details

Type: Bug
Resolution: Done
Priority: P1: Critical
Fix Version/s: 5.12.2, 5.14.0 Alpha
Affects Version/s: 5.12.0
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/