Bug 428575 - [Wayland] Extremely slow/choppy scrolling when I drag the scrollbar
Summary: [Wayland] Extremely slow/choppy scrolling when I drag the scrollbar
Status: RESOLVED FIXED
Alias: None
Product: frameworks-qqc2-desktop-style
Classification: Frameworks and Libraries
Component: general (show other bugs)
Version: 5.86.0
Platform: Arch Linux Linux
: NOR normal
Target Milestone: ---
Assignee: Marco Martin
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2020-11-01 20:53 UTC by Patrick Silva
Modified: 2022-01-06 17:18 UTC (History)
6 users (show)

See Also:
Latest Commit: https://invent.kde.org/frameworks/kirigami/-/commit/f6ca218607ff7e5d5066eb3224154c3256cb9516
Version Fixed In: 5.90
Sentry Crash Report:

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Description Patrick Silva 2020-11-01 20:53:46 UTC 
STEPS TO REPRODUCE
1. open Discover on Wayland session
2. click on "Applications" in the sidebar
3. scroll the applications list by dragging the scrollbar

OBSERVED RESULT
scrolling is extremely choppy/slow

EXPECTED RESULT
smooth scrolling

SOFTWARE/OS VERSIONS
Operating System: KDE neon Unstable Edition
KDE Plasma Version: 5.20.80
KDE Frameworks Version: 5.76.0
Qt Version: 5.15.0
Comment 1 Justin Zobel 2020-11-01 23:29:15 UTC 
Confirmed on KDE Neon User Edition.
Comment 2 Patrick Silva 2021-02-13 15:19:38 UTC 
Probably this bug should be re-assigned to another product.
I can also reproduce by scrolling a long list of window rules in Window Rules KCM.
Comment 3 Patrick Silva 2021-09-16 16:40:36 UTC 
on Plasma 5.23 beta Discover even crashes after the provided steps.

Operating System: Arch Linux
KDE Plasma Version: 5.22.90
KDE Frameworks Version: 5.86.0
Qt Version: 5.15.2
Graphics Platform: Wayland
Comment 4 Aleix Pol 2021-09-23 21:40:58 UTC 
TBH it's working remarkably well on my system. Can you provide a backtrace maybe?
Comment 5 Patrick Silva 2021-09-24 15:17:53 UTC 
(In reply to Aleix Pol from comment #4)
> TBH it's working remarkably well on my system. Can you provide a backtrace
> maybe?

I see no crash notification and coredumpctl indicates no crash. Possibly it's another case of
"The Wayland connection experienced a fatal error: Invalid argument". :(
Comment 6 Nate Graham 2022-01-06 17:18:26 UTC 
Scrolling issues were fixed by https://invent.kde.org/frameworks/kirigami/-/commit/f6ca218607ff7e5d5066eb3224154c3256cb9516; let's tracy any crashes in a new bug report, if they're still applicable.