Bug 84445

Summary:	Wheels cause duplicate events when in same frame as ABS events
Product:	xorg	Reporter:	Peter Hutterer <peter.hutterer>
Component:	Input/evdev	Assignee:	Peter Hutterer <peter.hutterer>
Status:	RESOLVED FIXED	QA Contact:	Xorg Project Team <xorg-team>
Severity:	normal
Priority:	medium	CC:	eric.brunet, peter.hutterer
Version:	git
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:
Bug Depends on:
Bug Blocks:	82250

Description Peter Hutterer 2014-09-29 03:10:02 UTC

See XIT test EvdevMixedDeviceTest.AbsXYAndRelScroll, needs a device with ABS_X, ABS_Y, REL_WHEEL and BTN_LEFT (for evdev, not used).

If the REL_WHEEL event is in the same EV_SYN frame as an ABS_* event, evdev sets rel_queued and abs_queued both to 1 and submits the same valuator mask twice to the server. This can cause duplicate events.

Comment 1 Peter Hutterer 2015-03-27 01:34:43 UTC

commit e0e2587a95afaeb25ad73bb8b27488e79d1fe02e
Author: Éric Brunet <Eric.Brunet@lps.ens.fr>
Date:   Tue Sep 30 14:27:20 2014 +0200

    Split pEvdev->vals into pEvdev->abs_vals and pEvdev->rel_vals

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