SUMMARY When scrolling using a touchpad in the system tray entries section, scrolling is jittery and unlike the rest of the desktop and it's components. STEPS TO REPRODUCE 1. Open system tray settings 2. Go to entries 3. Scroll through entries OBSERVED RESULT Scrolling is jittery compared to other sections of the desktop. EXPECTED RESULT Scrolling is smooth and line-by-line. SOFTWARE/OS VERSIONS Linux/KDE Plasma: OpenSUSE Tumbleweed 20210824 (available in About System) KDE Plasma Version: 5.22.4 KDE Frameworks Version: 5.85.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION Bug persists with vanilla kernel.
I cannot reproduce any stuttering when I scroll on the expanded items view, but it's true that it bounces when it hits the top or bottom. Is that the issue?
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(In reply to Nate Graham from comment #1) > I cannot reproduce any stuttering when I scroll on the expanded items view, > but it's true that it bounces when it hits the top or bottom. Is that the > issue? Not anything I've noticed. It's more when actively scrolling through entries. It's as if it drops frames. I think it's down to smooth scrolling on a touchpad, as there's no issue when using a mouse with line by line, non smooth scrolling.
What kinds of graphics hardware do you have?
(In reply to Nate Graham from comment #4) > What kinds of graphics hardware do you have? Just Intel graphics (UHD 620). This might not be a Plasma bug actually, I'm getting similar stuttering when scrolling in Gnome Software in Gnome 40.
Thanks for the info. If that's the case, it's either a bug in Libinput, or a hardware issue, which Libinput is failing to work around, or working around improperly. Either way I would recommend following up with Libinput at https://gitlab.freedesktop.org/libinput/libinput/-/issues
(In reply to Nate Graham from comment #6) > Thanks for the info. If that's the case, it's either a bug in Libinput, or a > hardware issue, which Libinput is failing to work around, or working around > improperly. Either way I would recommend following up with Libinput at > https://gitlab.freedesktop.org/libinput/libinput/-/issues To follow up, I'm experiencing the same kind of stutter in the wallpaper selection window. The Gnome software stutter is another issue. When using Wayland, the issue goes away completely.
That supports my initial conclusion. :)
(In reply to Nate Graham from comment #8) > That supports my initial conclusion. :) Thanks Nate. In that case, I'll patiently wait for the 5. 23 release which includes greater Wayland support. I'm very grateful for your proactivity in responding to bug reports. It's much appreciated. :)
You're very welcome!