Bug 440401

Summary: [Wayland] Huge performance drop since 5.22.3
Product: [Plasma] kwin Reporter: Charles Bouchard-Légaré <cblegare.atl>
Component: wayland-genericAssignee: KWin default assignee <kwin-bugs-null>
Status: RESOLVED WORKSFORME    
Severity: normal CC: kde, nate
Priority: NOR Keywords: regression
Version: 5.22.3   
Target Milestone: ---   
Platform: Neon   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description Charles Bouchard-Légaré 2021-07-30 02:34:28 UTC 
SUMMARY

Since the 5.22.3 (also in 5.22.4), overall performance significantly dropped to the point the system is barely usable.


STEPS TO REPRODUCE

1. Use KDE Neon with Plasma 5.22.2
2. Update to a newer version
3. Observe very slow performances


OBSERVED RESULT

CPU usage and RAM usage look normal, but application are very slow to respond and keyboard inputs are delayed in any application. Sound in video chat is distorted because of lag.


EXPECTED RESULT

No major performance change when updating.


SOFTWARE/OS VERSIONS

Operating System: KDE neon 5.22
KDE Plasma Version: 5.22.3
KDE Frameworks Version: 5.84.0
Qt Version: 5.15.3
Kernel Version: 5.8.0-63-generic (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i7-8665U CPU @ 1.90GHz
Memory: 15.3 Gio of RAM
Graphics Processor: Mesa Intel® UHD Graphics 620


ADDITIONAL INFORMATION

Switching back to X and I don't feel any performance drop.

I am not sure what additional information I should provide, but will happily get anything asked.
Comment 1 Nate Graham 2021-07-30 14:26:18 UTC 
Hmm, cannot reproduce.
Comment 2 Charles Bouchard-Légaré 2021-07-30 18:22:54 UTC 
Maybe it has something to do with my multi monitor setup?  Also, how could you reproduce this, I mean how can you reliably pick a specific version of Plasma?
Comment 3 David Edmundson 2021-08-01 23:23:51 UTC 
>Sound in video chat is distorted because of lag.

Kwin can't cause that.
Comment 4 Charles Bouchard-Légaré 2021-08-04 00:31:39 UTC 
I don't know about KWin, I created the issue in `plasmashell` originally.

What info could I provide to help?
Comment 5 Bug Janitor Service 2021-08-19 04:36:25 UTC 
Dear Bug Submitter,

This bug has been in NEEDSINFO status with no change for at least
15 days. Please provide the requested information as soon as
possible and set the bug status as REPORTED. Due to regular bug
tracker maintenance, if the bug is still in NEEDSINFO status with
no change in 30 days the bug will be closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

If you have already provided the requested information, please
mark the bug as REPORTED so that the KDE team knows that the bug is
ready to be confirmed.

Thank you for helping us make KDE software even better for everyone!
Comment 6 Bug Janitor Service 2021-09-03 04:36:12 UTC 
This bug has been in NEEDSINFO status with no change for at least
30 days. The bug is now closed as RESOLVED > WORKSFORME
due to lack of needed information.

For more information about our bug triaging procedures please read the
wiki located here:
https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging

Thank you for helping us make KDE software even better for everyone!