Bug 418194 - If Blur effect is enabled, frame rate drops while logout screen is visible
Summary: If Blur effect is enabled, frame rate drops while logout screen is visible
Status: RESOLVED FIXED
Alias: None
Product: plasmashell
Classification: Plasma
Component: Theme - Breeze (show other bugs)
Version: 5.25.90
Platform: Arch Linux Linux
: NOR minor
Target Milestone: 1.0
Assignee: visual-design
URL:
Keywords: wayland
: 449258 452098 454232 (view as bug list)
Depends on:
Blocks:
 
Reported: 2020-02-25 19:13 UTC by Patrick Silva
Modified: 2023-11-19 16:35 UTC (History)
5 users (show)

See Also:
Latest Commit:
Version Fixed In:

Attachments
30fps on Wayland (1.18 MB, image/png)
2020-02-25 19:13 UTC, Patrick Silva 		Details
View All Add an attachment

Note You need to log in before you can comment on or make changes to this bug.
Description Patrick Silva 2020-02-25 19:13:26 UTC 
Created attachment 126412 [details]
30fps on Wayland

STEPS TO REPRODUCE
1. enable "Show fps" effect in "Desktop Effects" kcm
2. press ctrl+alt+del to open logout screen
3. observe the frame rate shown by "Show fps" effect in the upper right corner

OBSERVED RESULT
frame rate drops from 60fps to 45fps on X11 and from 60fps to 30fps on Wayland. See the attached screenshot taken on Wayland.

EXPECTED RESULT
frame rate should remain the same while logout screen is visible

SOFTWARE/OS VERSIONS
Operating System: Arch Linux 
KDE Plasma Version: 5.18.2
KDE Frameworks Version: 5.67.0
Qt Version: 5.14.1
Comment 1 Nate Graham 2020-09-29 03:59:11 UTC 
Probably due to the big full-screen blur effect.
Comment 2 Patrick Silva 2021-09-18 16:40:02 UTC 
(In reply to Nate Graham from comment #1)
> Probably due to the big full-screen blur effect.

you are right. I'm unable to reproduce when blur effect is disabled in Desktop Effects KCM.

Operating System: Arch Linux
KDE Plasma Version: 5.22.90
KDE Frameworks Version: 5.86.0
Qt Version: 5.15.2
Kernel Version: 5.14.5-arch1-1 (64-bit)
Graphics Platform: Wayland
Comment 3 Nate Graham 2022-01-27 22:45:46 UTC 
*** Bug 449258 has been marked as a duplicate of this bug. ***
Comment 4 Nate Graham 2022-04-01 18:45:14 UTC 
*** Bug 452098 has been marked as a duplicate of this bug. ***
Comment 5 Patrick Silva 2022-05-20 01:08:29 UTC 
it's still reproducible at least on Wayland.

Operating System: Arch Linux
KDE Plasma Version: 5.24.90
KDE Frameworks Version: 5.94.0
Qt Version: 5.15.4
Graphics Platform: Wayland
Comment 6 Nate Graham 2022-05-23 20:19:04 UTC 
*** Bug 454232 has been marked as a duplicate of this bug. ***
Comment 7 Nate Graham 2022-10-17 01:43:54 UTC 
I can no longer reproduce this in Plasma 5.26, after being able to in the past. Can anyone else confirm?
Comment 8 Patrick Silva 2022-10-22 09:40:57 UTC 
I can reproduce at least on the Wayland session of both Arch Linux (Plasma 5.26.1) and neon unstable.
The fps drops from 55 to 40 on Arch Linux and from 60 to 45 on neon unstable.

Operating System: KDE neon Unstable Edition
KDE Plasma Version: 5.26.80
KDE Frameworks Version: 5.100.0
Qt Version: 5.15.6
Graphics Platform: Wayland
Comment 9 Nate Graham 2022-10-24 18:05:32 UTC 
I can reproduce that. This seems like a lass bad FPS drop than it used to be, because it's no longer visibly choppy to me.
Comment 10 Patrick Silva 2023-11-19 16:35:00 UTC 
Tested on X11 and Wayland; cannot reproduce.

Operating System: Arch Linux 
KDE Plasma Version: 5.27.80
KDE Frameworks Version: 5.245.0
Qt Version: 6.6.0
Graphics Platform: Wayland