Erratic mouse behavior in 12.04

[Marcelo Magno T. Sales]

Em domingo, 27 de maio de 2012, às 14:51:05, Marcelo Magno T. Sales escreveu:
> Hello,
> 
> I'm running Kubuntu 12.04 64 bits fully updated and I'm experiencing some
> strange mouse behaviors, completely reproducible in this machine (Dell
> Inspiron One 2320). I have three others (vaio notebook and two Dell
> notebooks) where this problem does not happen. Some examples:
> 1. In libreoffice Calc, if I hover the mouse over the zoom control bar in
> the bottom right corner of Calc's window, the mouse grabs the zoom control
> by itself, without me clicking any button. If I move the mouse left and
> right, without ever touching its buttons, it drags the zoom control left
> and right. 2. In libreoffice Calc, if I left-click a tab other than the
> currently selected one, the new tab is selected as expected, but the mouse
> behaves as if the clicked button had stuck. When I move the mouse after
> selecting another tab, the mouse cursor changes to the arrow with the
> little rectangle, as if it was dragging a cell.
> 3. In Chromium, if I right-click a link and left-click "Open link in new
> tab", the mouse behaves as if the left-click stuck. When I move the mouse
> after opening the new tab, the mouse cursor changes to the little hand
> grabbing a sheet, as if I was moving the clicked link.
> 4. In Chromium, if I middle-click a link to open it in a new tab and then
> left-click the newly opened tab, the mouse cursor changes to the cross with
> arrowed points (the move window cursor) and the window is restored, as if I
> had started to drag it and let it go right after.
> 
> Until now, I haven't noticed such mouse problems when using native KDE
> applications, except that sometimes I'm under the impression that the mouse
> cursor image is not updating correctly according to context (arrow, text
> insertion cursor, etc.).
> Any idea on what could be causing this?

I've just found out that all these problems mentioned above are related to a 
touchscreen device on this system. If I disable the touchscreen, all the 
problems go away. Now I'm trying to get rid of the problems while keeping a 
working touchscreen...

[]'s
Marcelo