Bug 445330 - QtQuick software is terribly slow when I use wayland
Summary: QtQuick software is terribly slow when I use wayland
Status: RESOLVED FIXED
Alias: None
Product: kwin
Classification: Plasma
Component: wayland-generic (show other bugs)
Version: 5.23.3
Platform: Arch Linux Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL: https://invent.kde.org/qt/qt/qtwaylan...
Keywords: wayland
Depends on:
Blocks:
 
Reported: 2021-11-11 12:50 UTC by Alinajafian81
Modified: 2022-01-23 11:02 UTC (History)
3 users (show)

See Also:
Latest Commit:
Version Fixed In:
vlad.zahorodnii: NVIDIA+

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Description Alinajafian81 2021-11-11 12:50:19 UTC 
SUMMARY
plasma shell is terrebly slow when i use wayland. buttons, taskbar, kickoff menu, notifications, and context menu in the desktop are freezed and doesn't work until i move the cursor. 
Qt and gtk apps like vlc, Dolphin, libreoffice are good and responsive. keyboard shortcuts like `ctrl+alt+t` are ok and responsive as well. scrolling in browser is smooth. I don't have any problem with switching between apps. But all Kirigami apps (i think) specially settings (takes two minutes to show up) are so slow. 
overview (top-left hot corner) is ok.
there is no problem in X11.

I put some videos for you: 
https://mega.nz/folder/pclXGKaJ#2S3F4Wt87_B58czktDqW5w

as you see the shell is not responsive and when i move my cursor it in the task bar it wakes up... (with choppy animation)
The second video show the same behavior but in Settings app.

STEPS TO REPRODUCE
1. switch to wayland with 495 drivers.
2. see issue

OBSERVED RESULT
plasma shell is terrebly slow.

EXPECTED RESULT
an ok plasma shell

SOFTWARE/OS VERSIONS

Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 5.23.3
KDE Frameworks Version: 5.87.0
Qt Version: 5.15.12

ADDITIONAL INFORMATION
GPU: Nvidia GTX750 ti
CPU: Intel core i5 6400
ROM: 8GB
SSD: Samsung 850 EVO
Comment 1 Nate Graham 2021-11-12 22:08:36 UTC 
Sounds like a graphics issue, as the issue only seems to happen with GPU-bound software. I wonder if the NVIDIA EGL support will fix this.
Comment 2 Zamundaaa 2021-11-20 21:24:39 UTC 
What is your egl-wayland version?
Comment 3 Alinajafian81 2021-11-21 08:47:22 UTC 
(In reply to Zamundaaa from comment #2)
> What is your egl-wayland version?

~]$ pacman -Q egl-wayland
egl-wayland 1:1.1.9+2+gdaab854-1
Comment 4 Alinajafian81 2021-11-28 14:04:04 UTC 
Update: egl-wayland was updated but the bug is still here.

```
]$ pacman -Q egl-wayland
egl-wayland 2:1.1.9+r3+g582b2d3-1
```
Comment 5 Alinajafian81 2022-01-23 11:02:05 UTC 
Ok the bug has been fixed now. thank you. Still the panel is so unstable and glitchy i assume it is not related to this bug...