Bug 394789 - Scrolling in Firefox is uneven on XWayland
Summary: Scrolling in Firefox is uneven on XWayland
Status: RESOLVED NOT A BUG
Alias: None
Product: kwin
Classification: Plasma
Component: wayland-generic (show other bugs)
Version: unspecified
Platform: Arch Linux Linux
: NOR normal
Target Milestone: ---
Assignee: KWin default assignee
URL:
Keywords: wayland-only
Depends on:
Blocks:
 
Reported: 2018-05-28 10:19 UTC by tromzy
Modified: 2018-05-28 15:39 UTC (History)
2 users (show)

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Description tromzy 2018-05-28 10:19:06 UTC 
I don't really know where to put this bug, maybe it's a bug in Firefox and not in Plasma, but I've been noticing for months that in Firefox on a Plasma Wayland session, if smooth scrolling is enabled (in Firefox settings), every two scrolling movements, Firefox scrolls twice. It's kind of hard to explain :

- scroll once with your mouse : firefox scrolls normally

- scroll again : this time Firefox scrolls double the distance

- Scroll again : Firefox scrolls fine.

- Etc.

See this forum thread : https://bbs.archlinux.org/viewtopic.php?pid=1788076#p1788076
Comment 1 tromzy 2018-05-28 10:19:41 UTC 
Turning off smooth scrolling in Firefox makes the problem disappear.
Comment 2 Matej Mrenica 2018-05-28 11:28:41 UTC 
Something similar also happens in chromium
Comment 3 Martin Flöser 2018-05-28 15:39:15 UTC 
Not a problem in KWin. Either Firefox or XWayland.