[SOLVED]Acer Aspire 1640z

[nitroshift]

I decided to post this here as it is OS independent. On to the problem:

After installing any OS, touchpad and keyboard respond very, very slowly and most of the times they don't respond at all (can't move the cursor or type anything). The problem doesn't come up if I use USB mouse and keyboard or boot in Safe Mode. Right now I have installed Windows 7 Ultimate x86 during first trial 30 days (not willing to activate it then realise some hardware died), but the issue can be reproduced in any OS (tried XP Professional and Vista Business, both x86).

Laptop specs:

Intel Pentium M 1.73GHz

1.5GB RAM

100GB hard-disk

Intel 915GM graphics

Any clue or idea is welcomed!

nitropuppy

[Ponch]

Does it change anything if you lower "hardware acceleration" in Display Properties (Settings/Advanced/Troubleshoot) ?

[nitroshift]

Does it change anything if you lower "hardware acceleration" in Display Properties (Settings/Advanced/Troubleshoot) ?

Nope.

[jaclaz]

After installing any OS ....

Please define the "any" :

• any OS
  
• any MS OS
  
• and MS NT based OS
  

Since #1 is unlikely to have happened, and probably also #2, I guess that the defintion is #3, in which case I would quickly try a Linux based LiveCD, just to make sure is somethng really "hardware dependant".

jaclaz

[nitroshift]

Following MagicAndre1981's guide here, I traced it to high CPU utilisation by ACPI.sys (98 - 100%). Still out of ideas...

[puntoMX]

Remove the battery and see if the problem is still there. Could be that Windows 7 is detecting somehow the battery "wrong" (Note that ACER is messing up big time too when it comes to this). I have not seen this under Win7 but I have seen this under XP and Vista.

[nitroshift]

punto, that solved the issue. Thanks a bunch!

[puntoMX]

, you are welcome, but what are you going to do now? Working without the battery?

[nitroshift]

The laptop is for my wife's use at home, when she's too lazy to come out of bed... Mains wall socket is near the bed, so problem sorted

[jaclaz]

It seems like on some machines it is possible to disable ACPI.SYS:

http://www.techtalkz.com/windows-xp/10281-...-cpu-usage.html

Or maybe using a nonACPI HAL?

A couple references to a similar issue with battery:

http://www.techspot.com/vb/all/windows/t-3...tting-Down.html

http://www.softwaretipsandtricks.com/forum...cess-print.html

jaclaz