Bug 482546

Summary:	Trackpoint middle mouse button pastes even after scrolling.
Product:	[I don't know] kde	Reporter:	Tom Sutherland <tsuther>
Component:	general	Assignee:	Unassigned bugs mailing-list <unassigned-bugs>
Status:	RESOLVED UPSTREAM
Severity:	normal	CC:	fanzhuyifan, nate
Priority:	NOR
Version:	unspecified
Target Milestone:	---
Platform:	Neon
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Tom Sutherland 2024-03-06 15:21:26 UTC

expected behavior:
middle mouse button should paste EXCEPT after scrolling.

problem behavior:
middle mouse button pastes even after scrolling up/down.

This happens in at least Chrome, Kate, and Konsole. 

Interestingly, it seems to work correctly immediately after a new logon, then the behavior starts shortly after.

It happens in X and Wayland.

Comment 1 Tom Sutherland 2024-03-06 15:25:48 UTC

also note that the paste happens when the middle-button is released - so for instance,  I press and hold the middle mouse button to scroll through konsole history - when I release the middle mouse button the buffer is pasted, and it brings me back down to the shell prompt.

Comment 2 Nate Graham 2024-03-06 19:52:24 UTC

On X11, all input goes through libinput and the X server, so KDE code is not involved. On Wayland it goes through libinput and KWin. While it's possible that both the X server and KWin have the exact same bug, it's more likely that the bug is in the source of commonality: libinput. So I would recommend that you report this to the libinput folks at https://gitlab.freedesktop.org/libinput/libinput/-/issues/. Thanks!

Comment 3 Tom Sutherland 2024-03-06 20:49:37 UTC

Thank you - libinput guys had a bug with same symptoms, but much better problem description:

https://gitlab.freedesktop.org/libinput/libinput/-/issues/964

This lead to a kernel firmware bug, which should be making it's way to kde neon eventually:

https://lore.kernel.org/all/20231223191401.70727-1-me@khvoinitsky.org/T/

Comment 4 Nate Graham 2024-03-08 01:58:50 UTC

Fabulous!