Desktop freezes

Bug #1797691 reported by András Kriston
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
plasma-desktop (Ubuntu)
New
Undecided
Unassigned

Bug Description

kubuntu 18.04 desktop regularly freezes. Mouse cursor still moving, but no reaction to mouse buttons or keyboard keys. Display doesn't update anymore (besides the moving cursor).

All packages are up-to-date. Crashes become frequent since Qt is updated to 5.11.2 (installed to /opt) less or no crashes were observed with previous version (5.9)

How to reproduce:
Start Qt Creator, open a project
Start build then stop prematurely: desktop crashes
Or Start debug mode, sometimes crashes on breakpoint or on stopping the debug

Today I had 4 crashes in half an hour with the upper method on my machine (AMD Ryzen 2700X, Vega64).
This machine never crashed before with Qt 5.9
Office machine (Ryzen 1800X, GeForce 1070) sometimes crashes with Qt 5.9. Since disabling skype those crashes are less frequent.

description: updated
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