Bug 26640

Summary:	mouse jumps to left upper corner after certain keys were pressed
Product:	xorg	Reporter:	ccc1 <cllccl>
Component:	Input/Keyboard	Assignee:	Xorg Project Team <xorg-team>
Status:	RESOLVED FIXED	QA Contact:	Xorg Project Team <xorg-team>
Severity:	normal
Priority:	medium	CC:	cllccl
Version:	7.5 (2009.10)
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:

Description ccc1 2010-02-18 14:08:13 UTC

hi,

how to reproduce:
1) press an alphanumeric key
2) press a multimedia key (in my case any of the keys that control the volume)
3) move the mouse
result: mouse cursor jumps immediately to the left upper corner of the screen

i have an external lenovo usb keyboard with trackpoint. xinput output:
Lite-On Technology Corp. ThinkPad USB Keyboard with TrackPoint    id=7    [slave  keyboard (3)]
this bug doesn't occur with my internal keyboard, which has a trackpoint and multimedia keys as well.

other people with usb keyboard mouse combos observed this behavior too:
http://bbs.archlinux.org/viewtopic.php?id=86344
https://bugs.launchpad.net/ubuntu/+source/rhythmbox/+bug/513852

Comment 1 ccc1 2010-02-18 14:15:45 UTC

two things i forgot to add:
OS:Linux cl-laptop 2.6.32-ARCH x86_64
and they keyboard is configured via hal.

Comment 2 Peter Hutterer 2010-02-18 17:26:00 UTC

already fixed, thanks for the bug report though.


commit 6f265d55a61f9be323583b8acacae783be72bda9
Refs: xorg-server-1.7.99.2-40-g6f265d5
Author:     Peter Hutterer <peter.hutterer@who-t.net>
AuthorDate: Tue Jan 5 13:15:25 2010 +1000
Commit:     Keith Packard <keithp@keithp.com>
CommitDate: Tue Jan 5 14:01:51 2010 -0800

    dix: don't update the slave coordinates from the VCK.

    A keyboard event from a device with both valuators and keys will be posted
    through the VCK. In this case, do not update the slave device coordinates
    from the VCK - they're always 0/0. Leave them as-is, for the next pointer
    event will continue where it left.

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