Bug 258928

Summary: [GTK] Offset mouse cursor and jittery / stuttery dragging of the docked Web Inspector on Linux
Product: WebKit Reporter: Jeff Fortin <nekohayo>
Component: Web InspectorAssignee: Nobody <webkit-unassigned>
Status: RESOLVED FIXED    
Severity: Normal CC: bugs-noreply, fujii.hironori, inspector-bugzilla-changes, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Local Build   
Hardware: PC   
OS: Linux   
See Also: https://bugs.webkit.org/show_bug.cgi?id=144264
https://bugs.webkit.org/show_bug.cgi?id=258931
Attachments:
Description Flags
mouse event test none

Jeff Fortin
Reported 2023-07-06 07:16:54 PDT
This is mostly the same as bug #144264, but 8 years into the future, on Wayland on Linux, and the symptoms are much more pronounced, so I was told to report it separately. * It's extremely jittery * It's extremely slow (it "feels" slow on a graphics standpoint) * It is decoupled from the mouse cursor, you basically have to do 3x the distance / three attempts to position it to where you want. This is the video demonstrating the issue on my end: https://youtu.be/D2HDOnXup0k
Attachments
mouse event test (350 bytes, text/html)
2025-10-06 00:44 PDT, Fujii Hironori 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Jeff Fortin
Comment 1 2023-07-06 07:30:35 PDT
Also, I forgot to mention: this is Epiphany 44.3 with WebKitGTK 2.40.3, running atop GNOME 44.x on Fedora 38 with open source AMD "Pitcairn" Radeon R9 270 graphics, using a normal wired mouse (Logitech MX510, not some fancy high-resolution gamer mouse), default mouse acceleration settings. The mouse cursor size does not affect the observed behavior. GTK animations are turned off (set to "Reduce Animation" in GNOME's Settings).
Fujii Hironori
Comment 2 2025-10-05 08:27:18 PDT
Pull request: https://github.com/WebKit/WebKit/pull/51835
Fujii Hironori
Comment 3 2025-10-06 00:44:11 PDT
Created attachment 476973 [details] mouse event test
EWS
Comment 4 2025-10-07 01:39:06 PDT
Committed 301119@main (28387ea7e59d): <https://commits.webkit.org/301119@main> Reviewed commits have been landed. Closing PR #51835 and removing active labels.
Radar WebKit Bug Importer
Comment 5 2025-10-07 01:40:12 PDT
<rdar://problem/162100867>
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