Stéphane wrote:
> I bought my laptop Acer C300 2 weeks ago and started
> recently to experience some strange behaviours. All works
> quite well when I work on the battery but as soon as I use
> the AC electrical network, my pointer is attracted on the
> lower-right part of the screen, vibrates around this
> position, and opens the clock or other applications of my
> toolbar by its own. This is really annoying meaning that I
> have no control on my pointer anymore. Have you any idea
> what the problem could be? Could it comes from
> interferences in between the power supply and my screen?

I've the same problem (expect for automatic clicks) but this prob
started only after 5 months of use. Lower screen edge locations. It was
hard to pin down the cause, but it seems to get worse with increasing
temperature, at least on my c302 (LXT280E138 partnr series). In tablet
mode, if you find the problem is less apparent or even absent with the
c300 just newly booted from cold / room temperature, and gets worse the
longer the tablet is on (in tablet mode) and the more the screen frame
(logo, buttons) warms up, then it's definitely an issue with the wacom
digitizer and Acer should repair this under warranty.

You can also try out the new driver
http://www.wacom.com/tabletpc/driver.cfm
and then calibrate again, this could help too.

cheers,
- Jan