Bug 409036 - Random hangs with smart window placement on Wayland
Summary: Random hangs with smart window placement on Wayland
Status: RESOLVED DUPLICATE of bug 408754
Alias: None
Product: kwin
Classification: Plasma
Component: wayland-generic (show other bugs)
Version: 5.16.1
Platform: Arch Linux Linux
: NOR grave
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2019-06-22 12:59 UTC by Alois Wohlschlager
Modified: 2019-06-22 13:07 UTC (History)
1 user (show)

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Description Alois Wohlschlager 2019-06-22 12:59:07 UTC 
SUMMARY
When using the "Smart" window placement mode for KWin, this sometimes leads to a hung KWin.

STEPS TO REPRODUCE
1. Run the Wayland session
2. Make sure the window placement mode is "smart"
3. Open many windows

OBSERVED RESULT
Eventually, KWin will hang. Sysrq-R and examining the situation in a different TTY will show 100% CPU usage for KWin.

EXPECTED RESULT
KWin never hangs.

SOFTWARE/OS VERSIONS
Windows: n/a
macOS: n/a
Linux/KDE Plasma: Arch Linux w/ kernel 5.1.12-arch1-1-ARCH (fully updated as of 2019-06-22)
(available in About System)
KDE Plasma Version: 5.16.1
KDE Frameworks Version: 5.59.0
Qt Version: 5.12.4

ADDITIONAL INFORMATION
This bug does not occur on Xorg or with the "cascading" window placement mode.
Comment 1 David Edmundson 2019-06-22 13:07:01 UTC 

*** This bug has been marked as a duplicate of bug 408754 ***