Bug 73105

Summary:	mouse wheel tilt causes vertical instead of horizontal scrolling
Product:	xorg	Reporter:	Val Kulkov <val.kulkov>
Component:	Input/evdev	Assignee:	Peter Hutterer <peter.hutterer>
Status:	RESOLVED FIXED	QA Contact:	Xorg Project Team <xorg-team>
Severity:	normal
Priority:	medium	CC:	peter.hutterer
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description Val Kulkov 2013-12-28 18:29:15 UTC

A revision in the evdev code around late 2011 or early 2012 broke horizontal scrolling with certain types of mice such as Microsoft Wireless Laser Mouse 5000. Instead of firing button events 6 and 7, wheel tilt incorrectly fires events 4 and 5. The problem was reported in Launchpad Bug #926917:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-evdev/+bug/926917/

The source of the problem was later identified and a patch to evdev.c was suggested in post #16.

Further Launchpad bug report was filed recently with detailed information on hardware:
https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-input-evdev/+bug/1260513

The Ubuntu team has suggested that this bug is reported here so that the problem can be fixed upstream in the evdev module. Hence here is the bug report.

I should note that this problem is not the same as the one reported in Bug ID 36556 here.

Comment 1 Peter Hutterer 2014-01-06 00:25:35 UTC

Please attach the output from evtest when tilting the wheel. Does it really send REL_DIAL? If so, that seems incorrect.

Comment 2 Peter Hutterer 2014-04-28 02:21:44 UTC

Because I just ran into this bug in http://bugzilla.redhat.com/869065: this was triggered by the switch to smooth scrolling. The old scrolling code uses REL_DIAL as horiz wheel, the smooth scrolling code added it as vertical wheel

Comment 3 Peter Hutterer 2014-04-28 23:41:15 UTC

commit 16c85cbeacb721ed365c6240aabaad921b811fe0
Author: Peter Hutterer <peter.hutterer@who-t.net>
Date:   Mon Apr 28 12:23:18 2014 +1000

    Map REL_DIAL to horizontal scrolling (#73105)

Comment 4 Peter Hutterer 2014-04-28 23:53:32 UTC

Correction, I forgot a hunk there, commit is 41cf9212d02c1d2adca0e85702a1f0faba9e6b37

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