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?

Thanks for any help given.

There were some earlier problems on some Tablet PCs apparently relating to
the speaker location and the keyboard, Stéphane. Does this happen in all
screen orientations, but in the same physical location? If so, I would
contact the support section for Acer immediately and see if they have a
solution for you.
--
Chris H.
Microsoft Windows MVP/Tablet PC
Tablet Creations - http://nicecreations.us/
Associate Expert
Expert Zone - www.microsoft.com/windowsxp/expertzone


"Stéphane" <stephane@discussions.microsoft.com> wrote in message
news:201601c4fd65$716cb390$a401280a@phx.gbl...
>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?
>
> Thanks for any help given.
>

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

This is a known behavior problem with Acers and is usually one of two
things.

1) Some Acers shipped with the wrong power supply. If you call Acer support
and have your power supply ready so you can read them the serial number they
can tell you if yours is one of the defective ores. If so, it should be
replaced immediately as it can damage your machine.

2) There is an update for wise back light which automatically dims the
screen when you go onto betty power . To see if it is the problem, turn off
wise back light from Start Menu -> All Programs -> Acer -> Note book
manager. Tap Boot Options and uncheck Enable Auto Dim. Restart the
computer. If the problem goes away you can just leave it off (I do,
preferring To control the screen manually) or you can download an updated
version of Wise backlight from the Acer website.

-Jeff


"Stéphane" <stephane@discussions.microsoft.com> wrote in message
news:201601c4fd65$716cb390$a401280a@phx.gbl...
>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?
>
> Thanks for any help given.
>

Jeff,

I have searched for the Wise Backlight driver, but didn't succeed. Can you help me (us) out?
Unfortunately I experience the same pointer issue. I thought it was a driver at first, but I've been troubleshooting since I took it 15 feb out of the box by toggle drivers, without a sencible analysis.
I hope that I can find some help here.

Regards from Holland