Mouse movement jerky after plugging in external monitor

[Richard W.M. Jones]

I have a Lenovo X230 (laptop with a small internal screen) and
a large external screen.

When the external screen is not plugged in, mouse movements are
fine.

When I plug in the external screen (I have the XFCE desktop spread
over both internal and external), horizontal movements of the mouse
become quite "jerky".  It seems to move in minimum units of around 10
pixels.

It's almost as if mouse movements are being calculated as a percentage
of the screen width.

I can't find anything about this via searching.  Anyone have any ideas?

Rich.

Fedora 18
/var/log/Xorg.0.log attached

[Jack Craig]

On Tue, Jun 11, 2013 at 2:41 AM, Richard W.M. Jones wrote:
> I have a Lenovo X230 (laptop with a small internal screen) and
> a large external screen.
>
> When the external screen is not plugged in, mouse movements are
> fine.
>
> When I plug in the external screen (I have the XFCE desktop spread
> over both internal and external), horizontal movements of the mouse
> become quite "jerky".  It seems to move in minimum units of around 10
> pixels.
>
> It's almost as if mouse movements are being calculated as a percentage
> of the screen width.
>
> I can't find anything about this via searching.  Anyone have any ideas?
>
> Rich.
>
> Fedora 18
> /var/log/Xorg.0.log attached
>
> --
> Richard Jones, Virtualization Group, Red Hat
> http://people.redhat.com/~rjones
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I have this symptom on my F17, logitech/usb, used to be fine..

i swapped out the mouse and the symptom went away,...

i'll watch for a resolution, the system settings didnt help me either, ..

TIA, jackc...

[Richard W.M. Jones]

On Tue, Jun 11, 2013 at 08:50:24AM -0700, Jack Craig wrote:
> I have this symptom on my F17, logitech/usb, used to be fine..
>
> i swapped out the mouse and the symptom went away,...

Indeed an external mouse works fine for me too.  (Unfortunately
I can't use one for long periods b/c of RSI).

Rich.