0a22502c34
The current algorithm triggers a bug in Xwayland when two devices have different granularity of scrolling. In Xwayland, the scroll increment is 1 and all physical devices scroll through the same (x)wayland pointer device. This may cause events to get lost when changing devices: - mouse scrolls by full increment, current value is 1.0 last scroll button was sent for valuator value 0.0, delta is 1.0 and we emulate a button event. - touchpad scrolls by partial increment, current value is 1.3 last scroll button was sent for valuator value 1.0, delta is 0.3 and no button event is emulated - mouse scrolls by full increment, current value is -0.7, last scroll button was sent for valuator value 1.0, delta is -0.7 and no button event is emulated Thus the wheel event appears to get lost. Xwayland cannot reliably detect this case because we don't see the physical devices. We can work around this by instead emulating buttons whenever we cross a multiple of increment. However, this has a drawback: high-resolution scroll devices can now trigger a button event storm by jittering across the multiple of increment. e.g. in the example above the touchpad moving from 1.3 to 1.0 would cause a click, despite this being a third of an increment. Fixes #1339 Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> Acked-by: Olivier Fourdan <ofourdan@redhat.com> |
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X Server
The X server accepts requests from client applications to create windows, which are (normally rectangular) "virtual screens" that the client program can draw into.
Windows are then composed on the actual screen by the X server (or by a separate composite manager) as directed by the window manager, which usually communicates with the user via graphical controls such as buttons and draggable titlebars and borders.
For a comprehensive overview of X Server and X Window System, consult the following article: https://en.wikipedia.org/wiki/X_server
All questions regarding this software should be directed at the Xorg mailing list:
https://lists.freedesktop.org/mailman/listinfo/xorg
The primary development code repository can be found at:
https://gitlab.freedesktop.org/xorg/xserver
For patch submission instructions, see:
https://www.x.org/wiki/Development/Documentation/SubmittingPatches
As with other projects hosted on freedesktop.org, X.Org follows its Code of Conduct, based on the Contributor Covenant. Please conduct yourself in a respectful and civilized manner when using the above mailing lists, bug trackers, etc: