Bug 417613

Summary:	KDE 5.18: window flickering and some system crashes
Product:	[Plasma] kwin	Reporter:	Duns <web>
Component:	general	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED NOT A BUG
Severity:	major	CC:	nate, web
Priority:	NOR
Version First Reported In:	5.18.0
Target Milestone:	---
Platform:	Kubuntu
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Duns 2020-02-14 07:03:35 UTC

SUMMARY


STEPS TO REPRODUCE
1. in system settings activate more than one virtual destkop
2. try to open a whatever window
3. the window flickrs and is unusable

OBSERVED RESULT

the window flickrs and is unusable

EXPECTED RESULT

the window should be stable
SOFTWARE/OS VERSIONS

Operating System: KDE neon 5.18
KDE Plasma Version: 5.18.0
KDE Frameworks Version: 5.67.0
Qt Version: 5.13.2
Kernel Version: 5.3.0-28-generic
OS Type: 64-bit
Processors: 2 × Intel® Core™ i3-7100 CPU @ 3.90GHz
Memory: 7,7 GiB of RAM

ADDITIONAL INFORMATION

Comment 1 Duns 2020-02-14 07:14:41 UTC

Not always this happens, I noticed

Comment 2 Duns 2020-02-14 20:32:20 UTC

I'm not sure that enabling virtual desktops is the cause of flickering, that happens sometimes.
And today I have had two system crashes.
What log should I check?

Comment 3 Duns 2020-02-15 04:16:15 UTC

This my configuration:

inxi -SMGxxxz
System:    Host: duns-neon Kernel: 5.3.0-28-generic x86_64 bits: 64 gcc: 7.4.0
           Desktop: KDE Plasma 5.18.0 (Qt 5.13.2) dm: sddm,sddm
           Distro: KDE neon User Edition 5.18
Machine:   Device: desktop Mobo: MSI model: B250M PRO-VD (MS-7A74) v: 1.0 serial: N/A
           UEFI [Legacy]: American Megatrends v: 1.20 date: 12/02/2016
Graphics:  Card-1: Intel HD Graphics 630 bus-ID: 00:02.0 chip-ID: 8086:5912
           Card-2: NVIDIA GK208B [GeForce GT 710] bus-ID: 01:00.0 chip-ID: 10de:128b
           Display Server: x11 (X.Org 1.19.6 )
           drivers: modesetting,nouveau (unloaded: fbdev,vesa)
           Resolution: 1920x1080@60.00hz
           OpenGL: renderer: NV106 version: 4.3 Mesa 19.2.8 Direct Render: Yes

Comment 4 Duns 2020-02-15 04:18:20 UTC

and this (neofecth --off)

OS: KDE neon User Edition 5.18 x86_64 
Host: MS-7A74 1.0 
Kernel: 5.3.0-28-generic 
Uptime: 30 mins 
Packages: 1992 
Shell: bash 4.4.20 
Resolution: 1920x1080 
DE: KDE 
WM: KWin 
Theme: Breeze [KDE], Breeze [GTK2/3] 
Icons: Humanity [KDE], Humanity [GTK2/3] 
Terminal: konsole 
CPU: Intel i3-7100 (2) @ 3.900GHz 
GPU: Intel Integrated Graphics 
GPU: NVIDIA GeForce GT 710 
Memory: 2069MiB / 7854MiB

Comment 5 Duns 2020-02-18 16:41:01 UTC

btw I noticed another bug, reported here: https://bugs.kde.org/show_bug.cgi?id=417818
I don't know if it is related with this one, maybe...

Comment 6 Duns 2020-03-01 11:50:26 UTC

Today I installed ndvidia driver. Maybe this was the problem: I will see and tell you.

Comment 7 Duns 2020-03-13 16:11:24 UTC

so far it has worked: probably it was a driver problem.

Comment 8 Christoph Feck 2020-04-09 21:54:25 UTC

Thanks for the update; changing status.