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[PeteC <peterpion@xxxxxxxxx>]

Public bug reported:

Binary package hint: xorg

The mouse makes random jumps of about 20 pixels while being moved. Its
very much like using an optical mouse on too smooth a surface - but this
is when using a thinkpad trackpoint device - no other pointing device
plugged in.

This happens after executing the following commands

xrandr --fb 1920x1200
xrandr --output VGA1 --mode 1920x1200
xrandr --output LVDS1 --mode 1280x800
xrandr --output VGA1 --pos 0x0
xrandr --output LVDS1 --panning 1920x1200+0+0/1920x1200+0+0/0/0/0/0

(Specifically, after executing the last one).

Its very difficult to pick accurately a place to click, so if I am
trying to maximise or minimise a window for instance, sometimes it kills
the window instead - and vice versa.

It only starts when the xrand panning command is activated. However I
have been desperate for this feature to be put back since it was removed
in a past version of Ubuntu and I am loathe to ditch panning.

An accurate description is this. Picking a point to click, lets say the
'file' dialogue in a window, I move the mouse towards this point. As I
get close, the mouse starts 'vibrating' rapidly (at a guess about 10
jumps per second). When I stop moving the mouse, the pointer stays
still.  However the pointer might not be where I need it. I move the
mouse one pixel (very carefully) towards where I want it to be, and it
shoots about 20 pixels down and to the right. Move another pixel and it
jumps back to the original position, etc. The result with slow mouse
movement is a vibrating mouse pointer that you can not place anywhere.

This only happens in certain parts of the screen, but which part
randomly varies. If I go back to a part of the screen where the pointer
was vibrating 2 mins ago, it might not be vibrating now. However it
might be vibrating if I move it to a different part of the screen now.
As I work, it gets in the way frequently, at least once a minute. It
also happens when I am simply over the desktop, and not over any
application buttons or similar.

I have also filed a different bug which is related to panning and the
mouse, which might be related, and which prevents the smaller window
into a larger virtual screen scrolling to the edge of the screen
sometimes.

My setup is a lenovo x200 laptop which is brand new, but which I tried
with windows 7 first without a problem. It has a dell 24 inch monitor
plugged in and I use the 2 screens at the same time, with a 1920x1200
virtual screen, with the monitor displaying this resolution natively and
the laptop with a 1280x800 screen displaying a 1280x800 window into the
virtual screen. Obviously the laptop screen pans around inside the
virtual screen. The laptop is running a clean 9.10 install which has
been updated by the update manager.

Before I execute the panning xrand command, the problem is not there.

If anyone can suggest things to try I will be glad to try them.

Best regards, Pete

ProblemType: Bug
Architecture: i386
Date: Sun Jan 17 13:09:26 2010
DistroRelease: Ubuntu 9.10
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
MachineType: LENOVO 7449C4G
Package: xorg 1:7.4+3ubuntu10
ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.31-17-generic root=UUID=b08feae2-fbdf-4bd3-8a12-b962e527183b ro quiet splash
ProcEnviron:
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-17.54-generic
RelatedPackageVersions:
 xserver-xorg 1:7.4+3ubuntu10
 libgl1-mesa-glx 7.6.0-1ubuntu4
 libdrm2 2.4.14-1ubuntu1
 xserver-xorg-video-intel 2:2.9.0-1ubuntu2
 xserver-xorg-video-ati 1:6.12.99+git20090929.7968e1fb-0ubuntu1
SourcePackage: xorg
Uname: Linux 2.6.31-17-generic i686
XorgConf: Error: [Errno 2] No such file or directory: '/etc/X11/xorg.conf'
dmi.bios.date: 09/24/2009
dmi.bios.vendor: LENOVO
dmi.bios.version: 7WET60WW (3.10 )
dmi.board.name: 7449C4G
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr7WET60WW(3.10):bd09/24/2009:svnLENOVO:pn7449C4G:pvrThinkPadX200Tablet:rvnLENOVO:rn7449C4G:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 7449C4G
dmi.product.version: ThinkPad X200 Tablet
dmi.sys.vendor: LENOVO
fglrx: Not loaded
system:
 distro:             Ubuntu
 architecture:       i686kernel:             2.6.31-17-generic

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug i386

-- 
Mouse moves erratically after executing xrandr --panning
https://bugs.launchpad.net/bugs/508752
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