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AC Adapter not recognized on laptop

microsoft.public.windows.vista hardware devices






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Old 05-03-2008
Shaggy
 

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AC Adapter not recognized on laptop
Hi, I installed Vista 32 bits on my Compaq Presario v2000z (Turion) laptop a
while ago. The only problem I've had is that my power adapters (I've got 2)
are never recognized / seen by the OS, it states that I'm always on battery.
However, it is plugged in and the battery charges OK. The power LED says the
laptop is plugged in the outlet : only Vista does not recognize it. Because
of this, the power options are somewhat useless and I cannot install SP1 (it
checks for the power adapter on start).

Now before starting to blame the hardware, you must know that the laptop is
triple boot : Ubuntu, Windows XP and Vista (God bless MSDNAA for free OS for
IT students). And you must know that Ubuntu and XP both detect the power
adapter correctly. It really looks like a Vista bug in its ACPI drivers.
Anyone got a suggestion how to fix / diagnose this ? I'm a linux kernel
developper and I've programmed a couple of drivers on Windows. I've got
VS2005 + VS2008 with Widnows SDK + DDK installed, in case it might help. So
if you got the battery / ac adapter driver (cmbatt.sys if I remember correct)
source code laying around, feel free to share

Note: I've been able to install SP1 even if AC power was not recognized.
One only has to remove the battery. Then Windows is pretty messed up because
you don't have a battery, and don't have an AC adapter either. That tricks
the setup to believe you run on a desktop machine, and as soon as the setup
is started you can put back the battery.
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